Dispensers for dispensing microcapsules

ABSTRACT

A dispenser for applying at least two compositions, the dispenser including at least two reservoirs for storing the at least two compositions, at least two pumps for pumping the at least two compositions, a premix chamber containing a mixing element for mixing the two compositions, at least two channels for delivering the compositions from the reservoirs to the premix chamber, an exit orifice, optionally a swirl chamber, and an actuator.

TECHNICAL FIELD

The present disclosure generally relates to a dispenser for dispensing avolatile solvent and microcapsules stored in separate reservoirs.

BACKGROUND

Consumers often desire to deliver pleasant fragrances during and/orafter application of a product. Such fragrances often contain perfumeoils and/or other odoriferous materials that provide a scent for alimited period of time. It is also not uncommon to include a solvent forsolubilizing the perfumes oils and/or other odoriferous materials. Attimes, such solvents may be incompatible with other ingredients that mayprovide a benefit to the consumer. While dispensers that containseparate chambers for separating incompatible ingredients may exist,such dispensers may not be suitable for application in a fine fragrancecontext. Thus, there exists a need for dispensers that can keep someincompatible ingredients separate while delivering a suitable experienceto the consumer.

SUMMARY

A dispenser (10) comprising a first reservoir (50), the first reservoir(50) comprising a first pump (90) and a first composition (51); a secondreservoir (60), the second reservoir (60) comprising a second pump (100)and a second composition (61); a first channel (110) having a proximalend (111) and a distal end (112); a second channel (120) having aproximal end (121) and a distal end (122); an exit orifice (40); apremix chamber (150); a swirl chamber (130); and an actuator (30);wherein the proximal end (111) of the first channel (110) is in liquidcommunication with the first pump (90) and the distal end (112) of thefirst channel (110) is in liquid communication with the premix chamber(150); wherein the proximal end (121) of the second channel (120) is inliquid communication with the second pump (100) and the distal end (122)of the second channel (120) is in liquid communication with the premixchamber (150); wherein the premix chamber (150) is in liquidcommunication with the swirl chamber (130); wherein the swirl chamber(130) is in liquid communication with the exit orifice (40); whereinsaid first pump (90) and second pump (100) are operatively associatedwith the actuator (30); wherein said first composition (51) comprisesmicrocapsules and said second composition (61) comprises a volatilesolvent; wherein said premix chamber (150) comprises a mixing element(400). A method of providing a longer lasting fragrance, the methodcomprising spraying the first and second composition using the dispenserdescribed above.

BRIEF DESCRIPTION OF THE DRAWINGS

While the specification concludes with claims, it is believed that thesame will be better understood from the following description taken inconjunction with the accompanying drawings in which:

FIG. 1 is a front view of a dispenser;

FIG. 2 is a cross sectional view of the side of a dispenser;

FIG. 3 is a cross sectional view of the front of a dispenser;

FIG. 3A is a cross sectional view of the front of a dispenser;

FIG. 3B is a cross sectional view of the front of a dispenser;

FIG. 4 is a cross sectional, top view of a dispenser;

FIG. 4A is an enlarged sectional view of an area within FIG. 4;

FIG. 4B is a cross sectional, top view of a dispenser;

FIG. 4C is an enlarged sectional view of an area within FIG. 4B;

FIG. 4D is a cross sectional, top view of a dispenser;

FIG. 4E is a cross sectional, front view on line 4E of FIG. 4D;

FIG. 5 is a perspective, cross sectional view of the top of a dispenser;

FIG. 5A is a perspective, cross sectional view of top of a dispenserwithout a swirl chamber;

FIG. 5B is a perspective, cross sectional view of a swirl chamber;

FIG. 6 a cross sectional, top view of a dispenser;

FIG. 6A is a cross section of an area within FIG. 6;

FIG. 6B is an enlarged sectional view of an area within FIG. 6;

FIG. 7 is a cross sectional, top view of a dispenser;

FIG. 7A is a front view of an annular baffle;

FIG. 7B is a perspective, cross sectional view of the top of adispenser;

FIG. 7C is an enlarged sectional view of an area within FIG. 7B;

FIG. 8 is a perspective, cross sectional view of the top of a dispenser;

FIG. 8A is an enlarged sectional view of an area within FIG. 8;

FIG. 8B is bottom view of FIG. 8;

FIG. 8C is perspective view of a static mixer;

FIG. 9 is a cross sectional, top view of a dispenser;

FIG. 9A is a perspective, cross sectional view of the top of adispenser; and

FIG. 9B is an enlarged sectional view of an area within FIG. 9A.

DETAILED DESCRIPTION

All percentages are weight percentages based on the weight of thecomposition, unless otherwise specified. All ratios are weight ratios,unless specifically stated otherwise. All numeric ranges are inclusiveof narrower ranges; delineated upper and lower range limits areinterchangeable to create further ranges not explicitly delineated. Thenumber of significant digits conveys neither limitation on the indicatedamounts nor on the accuracy of the measurements. All measurements areunderstood to be made at about 25° C. and at ambient conditions, where“ambient conditions” means conditions under about one atmosphere ofpressure and at about 50% relative humidity.

“Composition” as used herein, means ingredients suitable for topicalapplication on mammalian keratinous tissue. Such compositions may alsobe suitable for application to textiles or any other form of clothingincluding, but not limited to, clothing made from synthetic fibers likenylons and polyesters, and clothing made from acetate, bamboo, cupro,hemp, flannel, jute, lyocell, PVC-polyvinyl chloride, rayon, recycledmaterials, rubber, soy, Tyvek, cotton, and other natural fibers.

“Exit orifice” herein is shown as a passage from the swirl chamber tothe external environment.

“Free of” means that the stated ingredient has not been added to thecomposition. However, the stated ingredient may incidentally form as abyproduct or a reaction product of the other components of thecomposition.

“Nonvolatile” refers to those materials that are liquid or solid underambient conditions and have no measurable vapor pressure at 25° C. Thesematerials typically have a vapor pressure of less than about 0.0000001mmHg, and an average boiling point typically greater than about 250° C.

“Soluble” means at least about 0.1 g of solute dissolves in 100 ml ofsolvent at 25° C. and 1 atm of pressure.

“Substantially free of” means an amount of a material that is less than1%, 0.5%, 0.25%, 0.1%, 0.05%, 0.01%, or 0.001% by weight of acomposition.

“Derivatives” as used herein, include but are not limited to, amide,ether, ester, amino, carboxyl, acetyl, and/or alcohol derivatives of agiven chemical.

“Skin care actives” as used herein, means compounds that, when appliedto the skin, provide a benefit or improvement to the skin. It is to beunderstood that skin care actives are useful not only for application toskin, but also to hair, nails and other mammalian keratinous tissue.

“Volatile,” as used herein, unless otherwise specified, refers to thosematerials that are liquid or solid under ambient conditions and whichhave a measurable vapor pressure at 25° C. These materials typicallyhave a vapor pressure of greater than about 0.0000001 mmHg,alternatively from about 0.02 mmHg to about 20 mmHg, and an averageboiling point typically less than about 250° C., alternatively less thanabout 235° C.

Fine fragrances, like colognes and parfums, are often desired byconsumers for their ability to deliver pleasant scents. A drawback ofsuch fine fragrances is that, because the fragrances are typicallyvolatile, a consumer may have to reapply the fine fragrance after ashort period of time in order to keep the same scent expressed. Whileconsumers may desire a fine fragrance product with a longer duration ofnoticeability, there appears to be no simple solution for extending theduration of noticeability. Hence many fine fragrance products on themarket utilize an age old system including a volatile solvent andfragrance oils, said system often offering a short period ofnoticeability.

One method to increase the duration of noticeability of a fragrance in aproduct is to incorporate a controlled-release system into the product.In this regard, microcapsules have been included in certain productslike deodorants in order to delay the release of a fragrance into theheadspace. However, the stability of microcapsules within a compositionmay be impacted by the ingredients in the composition. For example, someingredients may cause the microcapsules to be unable to retain theirintegrity or the encapsulated fragrance to a certain level of degreeover time.

It has been observed that the presence of volatile solvents like ethanolin a composition may seriously impact the ability of a fragrance-loadedmicrocapsule to release its encapsulated fragrance into the headspace.Surprisingly, it has been discovered that minimizing the contact timebetween the microcapsules and the volatile solvent (e.g. ethanol) allowsthe microcapsules to deliver a noticeable benefit to a consumer. Thiscan be accomplished by using a dispenser that has at least tworeservoirs, one for storing the volatile solvent and the other forstoring the microcapsules and their carrier.

It has also been observed that many known dispensers containing at leasttwo reservoirs may not deliver a consistent noticeable benefit from themicrocapsules. For example, some dispensers that have more than onereservoir may prematurely mix the microcapsules with the volatilesolvent which may lead to clogging and/or damage to the microcapsulesthemselves. In this regard, some dispensers that have more than onereservoir may retain a significant amount of a mixture of the twocompositions from each reservoir somewhere between the exit orifice andthe reservoir such that the next actuation may yield a mixturecontaining damaged microcapsules. Such residual damaged microcapsulesmay also promote clogging. For example, some dispensers may retain asmuch as 100% of the composition to be dispensed, by weight of thedispensed amount, depending on the design, between the exit orifice andthe reservoir. Also, some dispensers may apply too much force to themicrocapsules during the dispensing process such that a significantamount of the microcapsules prematurely release their contents. Becauseof the incompatibility of the microcapsule and the volatile solvent,such dispensers may deliver an inconsistent olfactory experience to theconsumer.

Another significant problem that may present itself is that the carrierthat may be used for the microcapsules may have a high surface tensionsuch that the composition containing the microcapsules is resistant toatomization. For example when the carrier is water, the high surfacetension of water (73 dynes/cm at 20° C.) may resist atomization suchthat a stream is more likely dispensed rather than a spray. Theintroduction of a suspending agent for the microcapsules may furtherexacerbate the problem because the suspending agent may increase theviscosity of the composition containing the water and microcapsules,making it less likely said composition can overcome its relatively highsurface tension for atomization. It is well known that compositionshaving a high surface tension and a high viscosity are difficult toatomize without significant pressure generation. If the composition isnot dispensed with sufficient atomization, such a dispenser may not bedesirable for a high-end product like a fine fragrance.

In this regard, dispensers that mix the two compositions in-flight (i.e.the compositions are kept separate throughout the dispenser and aredispensed via distinct exit orifices, with the angle of exit of eachcomposition leading to a mixing of the two compositions in the air) areunlikely to be useful when the second composition includes a volatilesolvent and the first composition includes water as the compositioncontaining water is resistant to atomization. In such a design, it ismore than likely that the composition containing the volatile solventmay atomize while the composition containing water will be resistant toatomization; leading to what appears to the user as fine stream within aspray. If such a result occurs, such a dispenser may not be desirablefor a high-end product like a fine fragrance.

Dispenser

The dispensers disclosed herein may provide for a consistent consumerexperience and a prolonged period of noticeability of a fragrance. Thedispensers described herein minimize the contact time between themicrocapsules and a volatile solvent (e.g. ethanol), allowing themicrocapsules to deliver a noticeable benefit to the user. Thedispensers described herein include at least two reservoirs, one forseparately storing each of the first and second compositions. Thedispensers also include a swirl chamber for atomizing the twocompositions. The first and second compositions exit the dispenser via acommon exit orifice. The dispensers also utilize at least two pumpsfitted with pistons, one pump for pumping the first composition and asecond pump for pumping the second composition to a common swirl chamberand exit orifice. Each pump pumps each composition into a channel thatserves to deliver the composition from the reservoir to a premixchamber.

Mixing within the premix chamber as described herein provides severaladvantages. First, the dispensers herein take advantage of the fact thatthe mixture of certain volatile solvents like ethanol with water resultsin a mixture with a lower surface tension than water, increasing thelikelihood that the two compositions are appropriately aerosolized.Second, by limiting the duration and extent of the mixing, themicrocapsules are less likely to be damaged upon exit. Third, limitingthe duration and extent of mixing also minimizes potential clogging.Lastly, the designs herein provide a consistent consumer experience byminimizing the amount of residual mixture left within the dispenserafter each actuation event.

The dispensers described herein first mix the two compositionsimmediately prior to exit by first mixing the compositions within apremix chamber that includes a mixing element. Extensive mixing of thefirst composition containing microcapsules with the second compositioncontaining a volatile solvent lowers the relatively high surface tensionof the first composition containing microcapsules. It has been observedthat when a premix chamber that does not include a mixing element isused with a dispenser for spraying a mixture of a first compositioncontaining microcapsules and a second composition containing a volatilesolvent, the premix chamber may not provide sufficient mixing so thatthe resultant mixture is homogenous. In this regard, without a mixingelement within the premix chamber, the spraying of the mixture of thefirst and second composition may result in a spray containing largeparticles and/or jets and may not be suitable for use as a finefragrance product. Thus, including a mixing element within the premixchamber is advantageous when the dispenser is used to aerosolize a firstcomposition containing microcapsules and a second composition containinga volatile solvent.

The premix chamber may have a volume sufficient to contain from 1% to75% of the dispensed amount, alternatively from 2% to 20% of thedispensed amount, alternatively from 4% to 14% of the dispensed amount.The dispensers described herein provide an advantage over thosedispensers that have more than one reservoir and retain greater than 75%of the mixture of the two compositions from each reservoir somewherebetween the exit orifice and the reservoir. In this regard, dispensersthat retain greater than 75% will likely cause the next actuation toyield a mixture containing damaged microcapsules. Limiting the volume ofthe premix chamber allows for the dispenser to yield a consistentconsumer experience as such a design will limit the extent of damagedmicrocapsules sprayed from the dispenser during each actuation event.The following is a non-limiting example: if the total volume of thedispensed mixture is 105 microliters and the dispensed mixture containsabout 35 microliters of the first composition and 70 microliters of thesecond composition, the premix chamber may have a volume sufficient tomix between 5 microliters and 15 microliters of the first and secondcompositions combined.

The dispensers described herein may also be customized to allow for aflushing of the components of the mixture in order to remove anyresidual microcapsules that have come into contact with the volatilesolvent. These residual microcapsules may in some cases promoteclogging. The residual microcapsules may also leave an unsightly residueat or near the exit orifice that may be undesirable for a fine fragranceproduct. Without being limited by theory, it is believed that theconcentration and type of microcapsule used may in some cases lead to aclogging of the dispenser. To alleviate these problems, the dispensermay include an assembly for flushing.

The size of the dispenser may be such as to allow it to be handheld. Thedispenser may include a first composition stored in a first reservoirand a second composition stored in a second reservoir. The secondcomposition may include a volatile solvent and a first fragrance. Thefirst composition may include a plurality of microcapsules and a carrier(e.g. water). The first composition may further include a suspendingagent. The first and second compositions may each further include anyother ingredient listed herein unless such an ingredient negativelyaffects the performance of the microcapsules. Non-limiting examples ofother ingredients include a coloring agent included in at least one ofthe first and second compositions and at least one non-encapsulatedfragrance in the second composition. When the first compositioncomprises microcapsules encapsulating a fragrance, the first compositionmay further include a non-encapsulated fragrance that may or may notdiffer from the encapsulated fragrance in chemical make-up. In someexamples, the first composition may be substantially free of a materialselected from the group consisting of a propellant, ethanol, a detersivesurfactant, and combinations thereof; preferably free of a materialselected from the group consisting of a propellant, ethanol, a detersivesurfactant, and combinations thereof. Non-limiting examples ofpropellants include compressed air, nitrogen, inert gases, carbondioxide, gaseous hydrocarbons like propane, n-butane, isobutene,cyclopropane, and mixtures thereof. In some examples, the secondcomposition may be substantially free of a material selected from thegroup consisting of a propellant, microcapsules, a detersive surfactant,and combinations thereof; preferably free of a material selected fromthe group consisting of propellant, microcapsules, a detersivesurfactant, and combinations thereof.

The dispenser may be configured to dispense a volume ratio of the secondcomposition to the first composition at a ratio of from 10:1 to 1:10,from 5:1 to 1:5, from 3:1 to 1:3, from 2:1 to 1:2, or even 1:1 or 2:1,when the second composition comprises a volatile solvent and the firstcomposition comprises a carrier and a plurality of microcapsules,according to the desires of the formulator. The dispenser may dispense afirst dose of the second composition and a second dose of the firstcomposition such that the first dose and the second dose have a combinedvolume of from 30 microliters to 300 microliters, alternatively from 50microliters to 140 microliters, alternatively from 70 microliters to 110microliters.

As shown in FIG. 1, the dispenser 10 may have a housing 20, an actuator30 and an exit orifice 40. In some non-limiting examples, the exitorifice may have a volume of 0.01 cubic millimeters to 0.20 cubicmillimeters, such as when the exit orifice 40 has a volume of 0.03 cubicmillimeters. In some examples, the housing 20 may not be necessary; anon-limiting example of which is when the reservoirs 50, 60 are made ofglass. When the reservoirs are made of glass, the two reservoirs may beblown from the same piece of molten glass, appearing as a single bottlewith two reservoirs. Alternatively, when the reservoirs are made ofglass, the two reservoirs may be blown from separate pieces of moltenglass, appearing as two bottles, each with a single reservoir, andjoined together via a connector. One of ordinary skill in the art willappreciate that many possible designs of the reservoirs are possiblewithout deviating from the teachings herein; a non-limiting example ofwhich is a reservoir within a reservoir.

As shown in FIG. 2, the dispenser 10 may also contain a first reservoir50 for storing a first composition 51 and a second reservoir 60 forstoring a second composition 61. The reservoirs 50, 60 may be of anyshape or design. The dispenser may be configured to dispense anon-similar volume ratio (not 1:1) of the first composition 51 to thesecond composition 61, as shown in FIG. 2. The first reservoir 50 mayhave an open end 52 and a closed end 53. The second reservoir may havean open end 62 and a closed end 63. The open ends 52, 62 may be used toinsert the pump and/or dip tubes into the reservoirs. The open ends 52,62 may also be used to supply the reservoirs with the compositions. Oncesupplied, the open ends 52, 62 may be capped or otherwise sealed toprevent leakage from the reservoirs. In some examples, the firstcomposition 51 may include microcapsules 55. The dispenser may include afirst dip tube 70 and a second dip tube 80, although the dip tubes arenot necessary if alternative means are provided for airlesscommunication between the reservoir and the pump, a non-limiting exampleof which is a delaminating bottle. The dispenser may include a firstpump 90 (shown as a schematic) in communication with the first dip tube70. The dispenser may also include a second pump 100 (shown as aschematic) in communication with the second dip tube 80. The dispensermay also be configured to contain a first pump 90 and a second pump 100with different output volumes. In some non-limiting examples, at leastone pump may have an output of 70 microliters and the other pump mayhave an output of 50 microliters.

As shown in FIG. 2, the first reservoir 50 may be configured to hold asmaller volume than the second reservoir 60 or vice versa whennon-similar ratios of the first composition to the second compositionare to be dispensed. If dip tubes are included, the first dip tube 70may also be of a shorter length than the second dip tube 80 or viceversa. The inner workings of the pumps are routine unless otherwiseillustrated in the drawings. Such inner workings have been abbreviatedand shown as schematic so as to not obscure the details of the teachingsherein. Suitable pumps with outputs between 30 microliters to 140microliter may be obtained from suppliers such as Aptargroup Inc.,MeadWeastavo Corp., and Albea. Some examples of suitable pumps are thepre-compression pumps described in WO2012110744, EP0757592, EP0623060.

The first pump 90 may have a chamber 91 and the second pump 100 may havea chamber 101. As illustrated in FIG. 2, the first pump 90 and secondpump 100 may be configured so that the chambers 91, 101 have differentlengths and similar or the same diameters. The pumps as illustratedherein are in some cases magnified to show the inner details and may besmaller in size than they appear as illustrated herein when said pumpsare used for a fine fragrance.

As shown in FIG. 2, the dispenser may include a first channel 110 and asecond channel 120. In some non-limiting examples, the channels 110, 120have a volume of 5 millimeters to 15 millimeters, an example of which iswhen the channels have a volume of 8.4 cubic millimeters. The firstchannel 110 may have a proximal end 111 and a distal end 112. The secondchannel 120 may have a proximal end 121 and a distal end 122. Theproximal end 111 of the first channel 110 is in communication with theexit tube 92 of the first pump 90. The proximal end 121 of the secondchannel 120 is in communication with the exit tube 102 of the secondpump 100. The first channel 110 may be of a shorter length as comparedto the second channel 120. The second channel 120 may be disposed abovethe first channel 110 as illustrated in FIG. 2 or below the firstchannel 110. Alternatively, the first channel and second channel may besubstantially coplanar (i.e. exist side-by-side). The exit tubes 92, 102may have similar or different diameters which can provide for similar ordifferent volumes. In some non-limiting examples, the exit tubes have adiameter of 0.05 millimeters to 3 millimeters, an example of which iswhen one of the exit tubes has a diameter of 1.4 millimeters and theother exit tube has a diameter of 1 millimeter. In some non-limitingexamples, the exit tubes 92, 102 may have a volume of from 2 cubicmillimeters to 10 cubic millimeters, such as when one exit tube has avolume of 7.70 cubic millimeters and the other exit tube as a volume of3.93 cubic millimeters.

To minimize clogging such as may occur when a composition containsparticulates (e.g. microcapsules) or displays a different viscosity fromthe other composition, and/or to enhance mixing the channels 110, 120may be configured such that one of the channels has a larger diameterthan the other. The channel with the larger diameter may be used toprevent clogging when particulates are contained within a composition.An example of such an arrangement will be described later.

The distal end 112 of the first channel 110 and the distal end 122 ofthe second channel 120 serve to deliver the compositions into the premixchamber 150. The angle and position of entry of the distal ends ofchannels 110, 120 into the premix chamber 150 can be selected to preventor reduce clogging and also to influence mixing. A non-limiting exampledesign that incorporates fluid entry of the two compositions in atangential manner to create swirl in the premix chamber will bedescribed later. In some examples, the premix chamber 150 may includeinner baffles to facilitate mixing. The dispenser may also include atleast one feed to deliver the mixture of the first and secondcomposition from the premix chamber 150 to the swirl chamber 130. Theswirl chamber 130 may impart on the first composition 51 and the secondcomposition 61 a swirl motion. In some examples, the dispenser mayinclude a first feed 270 in communication with the swirl chamber 130 andthe premix chamber 150, as illustrated in FIG. 2. The dispenser may alsoinclude a second feed 280 in communication with the swirl chamber 130and the premix chamber 150. The first feed 270 may be configured to havea different diameter as compared to the second feed 280. Alternatively,the feeds 270, 280 may have a substantially similar diameter. In someexamples, the dispenser may have more than two feeds. The swirl chamber130 may impart on the first composition 51 and the second composition 61a swirl motion. The swirl chamber may be configured to deliver certainspray characteristics. For example, the fluid entering the swirl chambermay be provided a swirling or circular motion or other shape of motionwithin the swirl chamber 130, the characteristics of the motion beingdriven by the inward design of the swirl chamber 130. In some instances,the mixing of the two compositions in the premix chamber 150 may lowerthe surface tension of the compositions, and thereby, improving thelevel of atomization of the liquids. Incorporation of a swirl chamber130 may further promote atomization when compositions that vary insurface tension and viscosity are present in the reservoirs.

Alternatively, the dispenser 10 may be configured to dispense a similarvolume ratio (e.g. 1:1) of the first composition 51 to the secondcomposition 61, as shown in FIG. 3. In some examples, the reservoirs 50and 60 may be of a similar size. The first pump 90 and the second pump100 may selected to deliver similar outputs. In some examples, thedispenser may be configured so that the chambers 91, 101 have similar orthe same diameters while having the same or similar lengths that allowfor the same or similar stroke lengths for the pistons. In someexamples, the dispenser may be configured so that the reservoirsupplying the composition containing the microcapsules is delivered viathe longer channel when the channels are of different lengths.

Alternatively, the dispenser may be configured to dispense a non-similarvolume ratio (not 1:1) of the first composition 51 to the secondcomposition 61, as shown in FIG. 3A. In some examples, the first pump 90and the second pump 100 may be configured so that the chambers 91, 101have different diameters while having the same or similar lengths thatallow for the same or similar stroke lengths for the pistons, butdifferent pump outputs. Such configurations may deliver in seriesdispensing of a larger volume of either composition 51, 61 by allowingfor pistons of different stroke lengths.

Alternatively, the first channel 110 and the second channel 120 may belocated such that the channels 110, 120 deliver the compositions to anexit orifice 40 located between the exit tubes 92, 102, as shown in FIG.4. Moreover, in contrast to FIG. 2 where the second exit tube 102 ispositioned farther away from the exit orifice 40 as compared to thefirst exit tube 92, the first exit tube 92 and the second exit tube 102may be positioned so that the first exit tube 92 and the second exittube 102 are substantially equidistant from the exit orifice 40. Asshown in FIG. 4, the first channel 110 and second channel 120 may beconfigured to deliver their contents to the premix chamber 150 locatedbetween the first exit tube 92 and the second exit tube 102. As shown inFIG. 4A, the compositions are delivered to the premix chamber 150 viathe first channel 110 and the second channel 120. Once in the premixchamber 150, the mixture of the first and second compositions may travelto the swirl chamber 130 via the first feed 270 and second feed 280. Thedispenser may include a separator 391 that assists in forming the firstfeed 270 and the second feed 280.

Referring to FIG. 4B and FIG. 4C, an alternative arrangement is shown inwhich the channels 110, 120 are configured such that the channel 110 hasa larger diameter (or other transverse dimension) than the channel 120.This may minimize clogging such as may occur when a composition containsparticulates (e.g. microcapsules) or displays a different viscosity fromthe other composition and may enhance mixing. The channel 110 may beused to prevent clogging when particulates are contained within acomposition. The channels may have circular cross-section with arespective diameter which is constant along the length of the channel.The ratio of the diameter of the first channel 110 to that of the secondchannel 120 may be in the range of 5:1 to 1:5, more preferably 2:1 to1:2 most preferably 1.5:1 to 1:1.5. In the case of channels which have anon-circular cross-section, these ratios will apply to the respectivecross-sectional areas of the channels.

The use of dissimiliar channels may also increase mixing on entry to thepremix chamber. In one example, the respective distal ends of thechannels have different cross-sectional areas. The cross-sectional areaof the channel may vary along the length of the channel. The ratio ofthe cross-sectional area of the distal end 112 of the first channel 110to that of the distal end 122 of second channel 120 may be in the rangeof 5:1 to 1:5, more preferably 2:1 to 1:2 most preferably 1.5:1 to1:1.5. In some cases a smaller cross sectional area for the channeldelivering a volatile solvent will more effective, although in othercases this could be reversed and a smaller cross-sectional area used forthe channel delivering microcapsules. Without limitation, a usefulbenefit of the different cross-sectional areas of the distal ends of thechannels may be to create differences in flow velocity to increaseturbulence.

The use of different angles and position of entry for the channels 110,120 into mixing chamber 150 can also have a significant effect on mixingand clogging. Depending on the exact fluid compositions used it may beadvantageous to have the angle between channels 110 and 120 to be lessthan (or more than) 180°—as shown for example in FIG. 4—to maximise thevelocity of the two fluids, or 180° to maximise mixing by direct impactbetween the fluid flows. Arranging the angle of entry into the premixchamber of one or both of the channels such that the flows do notdirectly impact, but instead a swirl effect is created, can haveadvantages for mixing. Thus it may be arranged that one or both of thechannels enters the premix chamber not purely radially but with atangential component. Further embodiments could include the channelsentering the premix chamber at different positions along the axis of thepremix chamber and at different angles to the fluid flow direction.

Referring to FIG. 4D and FIG. 4E, an arrangement is shown in whichchannels 110, 120 enter the premix chamber 150 parallel to each otherbut offset vertically across the height of the c chamber 150. It will beseen that there is a tangential component to the angle at which eachchannel enters the premix chamber 150 with respect to the axis alongwhich the compositions are dispensed through the exit orifice 40. Thisensures the incoming flows swirl around the inside of the premix chamberand increases the degree of mixing.

It will be recognized that in another variation the channels may enterthe premix chamber offset in a horizontal direction. There may then be atangential component to the angle at which each channel enters thepremix chamber with respect to the vertical direction or the directionof the pump strokes. In appropriate cases, the two channels may enterthe premix chamber at locations offset both horizontally and vertically.

FIG. 5 shows a three-dimensional cross-section of a configuration for adispenser where the first channel 110 and the second channel 120 arelocated such that the channels 110, 120 deliver the compositions to anexit orifice 40 located between the exit tubes 92 102, similar to thedispenser of FIG. 4. FIG. 5A shows the configuration shown in FIG. 5without the swirl chamber 130 so that the channels 270, 280 and theseparator 391 can be better visualized.

FIG. 5B shows a three-dimensional cross-section of a non-limitingexample of a swirl chamber 130 that may be included in the dispensersdescribed herein. It is to be noted that the actual design of the swirlchamber may vary and that one of ordinary skill in the art willrecognize that many variations in the design of the swirl chamber arepossible. The swirl chamber may be used to impart a swirling motion ontothe compositions, said swirling motion promoting the atomization of thecompositions for delivery via the exit orifice 40 to the externalenvironment.

Referring to FIG. 5B, the swirl chamber 130 may have a wall 390 thatforms a cylindrical shape. The swirl chamber 130 may include one or morebaffles 380 which help form the flow passages 355. The baffles may be sodesigned as to form one or more flow passages 355 that serve to delivertheir contents to a swirl zone 371. In some examples, the swirl chamber130 may have at least two flow passages, at least three flow passages,or more than four flow passages. The exit orifice 40 serves to dischargethe fluid from the swirl zone 371 to the external environment of thedispenser. In some non-limiting examples, the combined volume of theswirl zone 371 and the flow passages may be from 0.10 cubic millimetersto 1.0 cubic millimeter, such as when the combined volume is 0.21 cubicmillimeters.

As shown in FIG. 6, the dispenser may be configured in some examples sothat the first channel 110 and the second channel 120 form a concentricarrangement 290 around each other before delivering the compositionsinto the premix chamber 150. As shown in FIG. 6A, the concentricarrangement 290 may contain an inner concentric channel 292 thatcontains the contents delivered via the first channel 110 and an outerconcentric channel 294 that surrounds the inner concentric channel 292that delivers the contents of the second channel 120. As shown in FIG.6B, the compositions are delivered to the premix chamber 150 via theinner concentric channel 292 and the outer concentric channel 294. Oncein the premix chamber 150, the mixture of the first and secondcompositions travels to the swirl chamber 130 via the first feed 270 andsecond feed 280. The dispenser may include a separator 391 that assistsin forming the first feed 270 and the second feed 280. Once in the swirlchamber 130, the mixture of the first and second compositions isreleased to the external environment via the exit orifice 40.

The premix chamber 150 may include a mixing element 400 to facilitatemixing of the first and second compositions 51, 61 within the premixchamber 150. In some examples, the mixing element 400 consists of asingle baffle or a series of baffles coordinated so as to increase theextent of mixing of the first and second compositions within the premixchamber 150. It is to be understood that the baffles may take manyshapes and arrangements depending on the shape of the premix chamber 150and the extent of mixing required. The following are few non-limitingexamples of some mixing elements.

As shown in FIG. 7, the dispenser may be configured to include a mixingelement 400 located within the premix chamber 150. As shown in FIGS. 7 &7A, the mixing element 400 may include at least one baffle 410. Thebaffle 410 may include a skirt 420 and an aperture 430 so as toconstrict the path of the first and second compositions 51, 61 withinthe premix chamber 150. As shown in FIGS. 7B & 7C, the baffle 410 may beplaced such that a first premix sub-chamber 440 and a second premixsub-chamber 450 are created.

As shown in FIGS. 8-8C, the mixing element 400 may include a staticmixer 460 that utilizes the flow energy of the first and secondcompositions 51, 61 which are fed into the static mixer 460 underpressure to turn the compositions through a complex, geometric baffle.In some examples, the static mixer 460 may produce patterns of flowdivision or radial mixing. As shown in FIGS. 9-9B, the premix chamber150 may include a mixing element 400 that includes at least two bafflesoffset from each other so as to create a tortuous path for the first andsecond compositions 51, 61. In some examples, the premix chamber 150 mayinclude a first baffle 470 and a second baffle 480 offset from eachother.

It is to be understood that optional minor improvements such as valvesto prevent reverse flow are to be included herein without deviating fromthe inventions herein. A non-limiting example is a valve included toprevent reverse flow from the swirl chamber to the channels. Othernon-limiting minor improvements may include a mesh to preventagglomerated particles from entering the pump.

Method of Use

The compositions disclosed herein may be applied to one or more skinsurfaces and/or one or more mammalian keratinous tissue surfaces as partof a user's daily routine or regimen. Additionally or alternatively, thecompositions herein may be used on an “as needed” basis. The compositionmay be applied to any article, such as a textile, or any absorbentarticle including, but not limited to, feminine hygiene articles,diapers, and adult incontinence articles. For example, while thecombinations of the dispensers and compositions described herein areexquisitely designed to be used as a fine fragrance spray, it isunderstood that such combinations may also be used as a body spray,feminine spray, adult incontinence spray, baby spray, or other spray.The size, shape, and aesthetic design of the dispensers described hereinmay vary widely.

Compositions

Volatile Solvents

The compositions described herein may include a volatile solvent or amixture of volatile solvents. The volatile solvents may comprise greaterthan 10%, greater than 30%, greater than 40%, greater than 50%, greaterthan 60%, greater than 70%, or greater than 90%, by weight of thecomposition. The volatile solvents useful herein may be relativelyodorless and safe for use on human skin. Suitable volatile solvents mayinclude C₁-C₄ alcohols and mixtures thereof. Some non-limiting examplesof volatile solvents include ethanol, methanol, propanol, isopropanol,butanol, and mixtures thereof. In some examples, the composition maycomprise from 0.01% to 98%, by weight of the composition, of ethanol orother volatile solvent(s).

Nonvolatile Solvents

The composition may comprise a nonvolatile solvent or a mixture ofnonvolatile solvents. Non-limiting examples of nonvolatile solventsinclude benzyl benzoate, diethyl phthalate, isopropyl myristate,propylene glycol, dipropylene glycol, triethyl citrate, and mixturesthereof.

Fragrances

The composition may comprise a fragrance. As used herein, “fragrance” isused to indicate any odoriferous material or a combination ofingredients including at least one odoriferous material. Any fragrancethat is cosmetically acceptable may be used in the composition. Forexample, the fragrance may be one that is a liquid or solid at roomtemperature. Generally, the non-encapsulated fragrance(s) may be presentat a level from about 0.001% to about 40%, from about 0.1% to about 25%,from about 0.25% to about 20%, or from about 0.5% to about 15%, byweight of the composition. Some fragrances can be considered to bevolatiles and other fragrances can be considered to be or non-volatiles,as described and defined herein.

A wide variety of chemicals are known as fragrances, non-limitingexamples of which include alcohols, aldehydes, ketones, ethers, Schiffbases, nitriles, and esters. More commonly, naturally occurring plantand animal oils and exudates comprising complex mixtures of variouschemical components are known for use as fragrances. Non-limitingexamples of the fragrances useful herein include pro-fragrances such asacetal pro-fragrances, ketal pro-fragrances, ester pro-fragrances,hydrolyzable inorganic-organic pro-fragrances, and mixtures thereof. Thefragrances may be released from the pro-fragrances in a number of ways.For example, the fragrance may be released as a result of simplehydrolysis, or by a shift in an equilibrium reaction, or by a pH-change,or by enzymatic release. The fragrances herein may be relatively simplein their chemical make-up, comprising a single chemical, or may comprisehighly sophisticated complex mixtures of natural and synthetic chemicalcomponents, all chosen to provide any desired odor.

The fragrances may have a boiling point (BP) of about 500° C. or lower,about 400° C. or lower, or about 350° C. or lower. The BP of manyfragrances are disclosed in Perfume and Flavor Chemicals (AromaChemicals), Steffen Arctander (1969). The ClogP value of the individualfragrance materials may be about −0.5 or greater. As used herein,“ClogP” means the logarithm to the base 10 of the octanol/waterpartition coefficient. The ClogP can be readily calculated from aprogram called “CLOGP” which is available from Daylight ChemicalInformation Systems Inc., Irvine Calif., USA or calculated usingAdvanced Chemistry Development (ACD/Labs) Software V11.02 (© 1994-2014ACD/Labs). Octanol/water partition coefficients are described in moredetail in U.S. Pat. No. 5,578,563.

Examples of suitable aldehyde include but are not limited to:alpha-Amylcinnamaldehyde, Anisic Aldehyde, Decyl Aldehyde, Lauricaldehyde, Methyl n-Nonyl acetaldehyde, Methyl octyl acetaldehyde,Nonylaldehyde, Benzenecarboxaldehyde, Neral, Geranial, 2, 6 octadiene,1,1 diethoxy-3,7dimethyl-, 4-Isopropylbenzaldehyde,2,4-Dimethyl-3-cyclohexene-1-carboxaldehyde,alpha-Methyl-p-isopropyldihydrocinnamaldehyde, 3-(3-isopropylphenyl)butanal, alpha-Hexylcinnamaldehyde, 7-Hydroxy-3,7-dimethyloctan-1-al,2,4-Dimethyl-3-Cyclohexene-1-carboxaldehyde, Octyl Aldehyde,Phenylacetaldehyde, 2,4-Dimethyl-3-Cyclohexene-1-carboxaldehyde,Hexanal, 3,7-Dimethyloctanal,6,6-Dimethylbicyclo[3.1.1]hept-2-ene-2-butanal, Nonanal, Octanal,2-Nonenal Undecenal,2-Methyl-4-(2,6,6-trimethyl-1-cyclohexenyl-1)-2-butenal,2,6-Dimethyloctanal3-(p-Isopropylphenyl)propionaldehyde,3-Phenyl-4-pentenal Citronellal, o/p-Ethyl-alpha,alpha-, 9-Decenal,dimethyldihydrocinnamaldehyde,p-Isobutyl-alpha-methylydrocinnamaldehyde, cis-4-Decen-1-al,2,5-Dimethyl-2-ethenyl-4-hexenal, trans-2-Methyl-2-butenal,3-Methylnonanal, alpha-Sinensal, 3-Phenylbutanal,2,2-Dimethyl-3-phenylpropionaldehyde,m-tert.Butyl-alpha-methyldihydrocinnamic aldehyde, Geranyloxyacetaldehyde, trans-4-Decen-1-al, Methoxycitronellal, and mixturesthereof.

Examples of suitable esters include but are not limited to: Allylcyclohexanepropionate, Allyl heptanoate, Allyl Amyl Glycolate, Allylcaproate, Amyl acetate (n-Pentyl acetate), Amyl Propionate, Benzylacetate, Benzyl propionate, Benzyl salicylate, cis-3-Hexenylacetate,Citronellyl acetate, Citronellyl propionate, Cyclohexyl salicylate,Dihydro Isojasmonate Dimethyl benzyl carbinyl acetate, Ethyl acetate,Ethyl acetoacetate, Ethyl Butyrate, Ethyl-2-methyl butryrate,Ethyl-2-methyl pentanoate Fenchyl acetate (1,3,3-Trimethyl-2-norbornanylacetate), Tricyclodecenyl acetate, Tricyclodecenyl propionate, Geranylacetate, cis-3-Hexenyl isobutyrate, Hexyl acetate, cis-3-Hexenylsalicylate, n-Hexyl salicylate, Isobornyl acetate, Linalyl acetate,p-t-Butyl Cyclohexyl acetate, (−)-L-Menthyl acetate, o-t-Butylcyclohexylacetate), Methyl benzoate, Methyl dihydro iso jasmonate,alpha-Methylbenzyl acetate, Methyl salicylate, 2-Phenylethyl acetate,Prenyl acetate, Cedryl acetate, Cyclabute, Phenethyl phenylacetate,Terpinyl formate, Citronellyl anthranilate, Ethyltricyclo[5.2.1.0-2,6]decane-2-carboxylate, n-Hexyl ethyl acetoacetate,2-tert.-Butyl-4-methyl-cyclohexyl acetate, Formic acid,3,5,5-trimethylhexyl ester, Phenethyl crotonate, Cyclogeranyl acetate,Geranyl crotonate, Ethyl geranate, Geranyl isobutyrate, Ethyl2-nonynoate2,6-Octadienoic acid, 3,7-dimethyl-, methyl ester,Citronellyl valerate, 2-Hexenylcyclopentanone, Cyclohexyl anthranilate,L-Citronellyl tiglate, Butyl tiglate, Pentyl tiglate, Geranyl caprylate,9-Decenyl acetate, 2-Isopropyl-5-methylhexyl-1 butyrate, n-Pentylbenzoate, 2-Methylbutyl benzoate (mixture with pentyl benzoate),Dimethyl benzyl carbinyl propionate, Dimethyl benzyl carbinyl acetate,trans-2-Hexenyl salicylate, Dimethyl benzyl carbinyl isobutyrate,3,7-Dimethyloctyl formate, Rhodinyl formate, Rhodinyl isovalerate,Rhodinyl acetate, Rhodinyl butyrate, Rhodinyl propionate,Cyclohexylethyl acetate, Neryl butyrate, Tetrahydrogeranyl butyrate,Myrcenyl acetate, 2,5-Dimethyl-2-ethenylhex-4-enoic acid, methyl ester,2,4-Dimethylcyclohexane-1-methyl acetate, Ocimenyl acetate, Linalylisobutyrate, 6-Methyl-5-heptenyl-1 acetate, 4-Methyl-2-pentyl acetate,n-Pentyl 2-methylbutyrate, Propyl acetate, Isopropenyl acetate,Isopropyl acetate, 1-Methylcyclohex-3-enecarboxylic acid, methyl ester,Propyl tiglate, Propyl/isobutyl cyclopent-3-enyl-1-acetate(alpha-vinyl), Butyl 2-furoate, Ethyl 2-pentenoate, (E)-Methyl3-pentenoate, 3-Methoxy-3-methylbutyl acetate, n-Pentyl crotonate,n-Pentyl isobutyrate, Propyl formate, Furfuryl butyrate, Methylangelate, Methyl pivalate, Prenyl caproate, Furfuryl propionate, Diethylmalate, Isopropyl 2-methylbutyrate, Dimethyl malonate, Bornyl formate,Styralyl acetate, 1-(2-Furyl)-1-propanone, 1-Citronellyl acetate,3,7-Dimethyl-1,6-nonadien-3-yl acetate, Neryl crotonate, Dihydromyrcenylacetate, Tetrahydromyrcenyl acetate, Lavandulyl acetate, 4-Cyclooctenylisobutyrate, Cyclopentyl isobutyrate, 3-Methyl-3-butenyl acetate, Allylacetate, Geranyl formate, cis-3-Hexenyl caproate, and mixtures thereof.

Examples of suitable alcohols include but are not limited to: Benzylalcohol, beta-gamma-Hexenol (2-Hexen-1-ol), Cedrol, Citronellol,Cinnamic alcohol, p-Cresol, Cumic alcohol, Dihydromyrcenol,3,7-Dimethyl-1-octanol, Dimethyl benzyl carbinol, Eucalyptol, Eugenol,Fenchyl alcohol, Geraniol, Hydratopic alcohol, Isononyl alcohol(3,5,5-Trimethyl-1-hexanol), Linalool, Methyl Chavicol (Estragole),Methyl Eugenol (Eugenyl methyl ether), Nerol, 2-Octanol, Patchoulialcohol, Phenyl Hexanol (3-Methyl-5-phenyl-1-pentanol), Phenethylalcohol, alpha-Terpineol, Tetrahydrolinalool, Tetrahydromyrcenol,4-methyl-3decen-5-ol, 1-3,7-Dimethyloctane-1-ol,2-(Furfuryl-2)-heptanol, 6,8-Dimethyl-2-nonanol, Ethyl norbornylcyclohexanol, beta-Methyl cyclohexane ethanol,3,7-Dimethyl-(2),6-octen(adien)-1-ol, trans-2-Undecen-1-ol2-Ethyl-2-prenyl-3-hexenol, Isobutyl benzyl carbinol, Dimethyl benzylcarbinol, Ocimenol, 3,7-Dimethyl-1,6-nonadien-3-ol (cis & trans),Tetrahydromyrcenol, alpha-Terpineol, 9-Decenol-1, 2(Hexenyl)cyclopentanol, 2,6-Dimethyl-2-heptanol, 3-Methyl-1-octen-3-ol,2,6-Dimethyl-5-hepten-2-ol, 3,7,9-Trimethyl-1,6-decadien-3-ol,3,7-Dimethyl-6-nonen-1-ol, 3,7-Dimethyl-1-octyn-3-ol,2,6-Dimethyl-1,5,7-octatrienol-3, Dihydromyrcenol,2,6,10-Trimethyl-5,9-undecadienol,2,5-Dimethyl-2-propylhex-4-enol-1,(Z),3-Hexenol,o,m,p-Methyl-phenylethanol, 2-Methyl-5-phenyl-1-pentanol,3-Methylphenethyl alcohol, para-Methyl dimethyl benzyl carbinol, Methylbenzyl carbinol, p-Methylphenylethanol, 3,7-Dimethyl-2-octen-1-ol,2-Methyl-6-methylene-7-octen-4-ol, and mixtures thereof.

Examples of ketones include but are not limited to:Oxacycloheptadec-10-en-2-one, Benzylacetone, Benzophenone, L-Carvone,cis-Jasmone, 4-(2,6,6-Trimethyl-3-cyclohexen-1-yl)-but-3-en-4-one, Ethylamyl ketone, alpha-Ionone, Ionone Beta, Ethanone,Octahydro-2,3,8,8-tetramethyl-2-acetonaphthalene, alpha-Irone,1-(5,5-Dimethyl-1-cyclohexen-1-yl)-4-penten-1-one, 3-Nonanone, Ethylhexyl ketone, Menthone, 4-Methylacetophenone, gamma-Methyl Ionone Methylpentyl ketone, Methyl Heptenone (6-Methyl-5-hepten-2-one), Methyl Heptylketone, Methyl Hexyl ketone, delta Muscenone, 2-Octanone,2-Pentyl-3-methyl-2-cyclopenten-1-one, 2-Heptylcyclopentanone,alpha-Methylionone, 3-Methyl-2-(trans-2-pentenyl)-cyclopentenone,Octenyl cyclopentanone, n-Amylcyclopentenone,6-Hydroxy-3,7-dimethyloctanoic acid lactone,2-Hydroxy-2-cyclohexen-1-one, 3-Methyl-4-phenyl-3-buten-2-one,2-Pentyl-2,5,5-trimethylcyclopentanone, 2-Cyclopentylcyclopentanol-1,5-Methylhexan-2-one, gamma-Dodecalactone, delta-Dodecalactonedelta-Dodecalactone, gamma-Nonalactone, delta-Nonalactone,gamma-Octalactone, delta-Undecalactone, gamma-Undecalactone, andmixtures thereof.

Examples of ethers include but are not limited to: p-Cresyl methylether,4,6,6,7,8,8-Hexamethyl-1,3,4,6,7,8-hexahydro-cyclopenta(G)-2-benzopyran,beta-Naphthyl methyl ether, Methyl Iso Butenyl Tetrahydro Pyran,(Phantolide) 5-Acetyl-1,1,2,3,3,6 hexamethylindan, (Tonalid)7-Acetyl-1,1,3,4,4,6-hexamethyltetralin, 2-Phenylethyl3-methylbut-2-enyl ether, Ethyl geranyl ether, Phenylethyl isopropylether, and mixtures thereof.

Examples of alkenes include but are not limited to: Allo-Ocimene,Camphene, beta-Caryophyllene, Cadinene, Diphenylmethane, d-Limonene,Lymolene, beta-Myrcene, Para-Cymene, alpha-Pinene, beta-Pinene,alpha-Terpinene, gamma-Terpinene, Terpineolene,7-Methyl-3-methylene-1,6-octadiene, and mixtures thereof.

Examples of nitriles include but are not limited to:3,7-Dimethyl-6-octenenitrile, 3,7-Dimethyl-2(3), 6-nonadienenitrile,(2E, 6Z) 2,6-nonadienenitrile, n-dodecane nitrile, and mixtures thereof.

Examples of Schiffs Bases include but are not limited to: Citronellylnitrile, Nonanal/methyl anthranilate, Anthranilic acid, N-octylidene-,methyl ester(L)-, Hydroxycitronellal/methyl anthranilate,2-Methyl-3-(4-Cyclamen aldehyde/methyl anthranilate, methoxyphenylpropanal/Methyl anthranilate, Ethyl p-aminobenzoate/hydroxycitronellal,Citral/methyl anthranilate, 2,4-Dimethylcyclohex-3-enecarbaldehydemethyl anthranilate, Hydroxycitronellal-indole, and mixtures thereof.

Non-limiting examples of fragrances include fragrances such as musk oil,civet, castoreum, ambergris, plant fragrances such as nutmeg extract,cardomon extract, ginger extract, cinnamon extract, patchouli oil,geranium oil, orange oil, mandarin oil, orange flower extract,cedarwood, vetyver, lavandin, ylang extract, tuberose extract,sandalwood oil, bergamot oil, rosemary oil, spearmint oil, peppermintoil, lemon oil, lavender oil, citronella oil, chamomille oil, clove oil,sage oil, neroli oil, labdanum oil, eucalyptus oil, verbena oil, mimosaextract, narcissus extract, carrot seed extract, jasmine extract,olibanum extract, rose extract, and mixtures thereof.

Carriers and Water

When the composition contains microcapsules, the composition may includea carrier for the microcapsules. Non-limiting examples of carriersinclude water, silicone oils like silicone D5, and other oils likemineral oil, isopropyl myristate, and fragrance oils. The carrier shouldbe one that does not significantly affect the performance of themicrocapsules. Non-limiting examples of non-suitable carriers for themicrocapsules include volatile solvents like 95% ethanol.

The compositions containing microcapsules may include about 0.1% toabout 95%, from about 5% to about 95%, or from 5% to 75%, by weight ofthe composition, of the carrier. When the composition contains avolatile solvent, the composition may include from about 0.01% to about40%, from about 0.1% to about 30%, or from about 0.1% to about 20%, byweight of the composition, of water.

In some examples, when a second composition containing a volatilesolvent and a first composition containing microcapsules are sprayed,the dose containing the mixture of the first and second compositions maycontain about 0.01% to about 75%, from about 1% to about 60%, from about0.01% to about 60%, or from about 5% to about 50%, by weight of thecomposition, of water.

Encapsulates

The microcapsules may be any kind of microcapsule disclosed herein orknown in the art. The microcapsules may be included from about 0.01% toabout 45%, by weight, of the composition. The microcapsules may have ashell and a core material encapsulated by the shell. The core materialof the microcapsules may include one or more fragrances or perfume oils.The shells of the microcapsules may be made from synthetic polymericmaterials or naturally-occurring polymers. Synthetic polymers may bederived from petroleum oil, for example. Non-limiting examples ofsynthetic polymers include nylon, polyethylenes, polyamides,polystyrenes, polyisoprenes, polycarbonates, polyesters, polyureas,polyurethanes, polyolefins, polysaccharides, epoxy resins, vinylpolymers, polyacrylates, and mixtures thereof. Natural polymers occur innature and may often be extracted from natural materials. Non-limitingexamples of naturally occurring polymers are silk, wool, gelatin,cellulose, proteins, and combinations thereof.

The microcapsules may be friable microcapsules. A friable microcapsuleis configured to release its core material when its shell is ruptured.The rupture may be caused by forces applied to the shell duringmechanical interactions. The microcapsules may have a shell with avolume weighted fracture strength of from about 0.1 mega Pascals toabout 15.0 mega Pascals, when measured according to the FractureStrength Test Method described herein, or any incremental valueexpressed in 0.1 mega Pascals in this range, or any range formed by anyof these values for fracture strength. As an example, a microcapsule mayhave a shell with a volume weighted fracture strength of 0.8-15.0 megaPascals (MPa), alternatively from 5.0-12.0 mega Pascals (MPa), oralternatively from 6.0-10.0 mega Pascals (MPa).

The microcapsules may have a median volume-weighted particle size offrom 2 microns to 80 microns, from 10 microns to 30 microns, or from 10microns to 20 microns, as determined by the Test Method for DeterminingMedian Volume-Weighted Particle Size of Microcapsules described herein.

The microcapsules may have various core material to shell weight ratios.The microcapsules may have a core material to shell ratio that isgreater than or equal to: 70% to 30%, 75% to 25%, 80% to 20%, 85% to15%, 90% to 10%, and 95% to 5%.

The microcapsules may have shells made from any material in any size,shape, and configuration known in the art. Some or all of the shells mayinclude a polyacrylate material, such as a polyacrylate randomcopolymer. For example, the polyacrylate random copolymer may have atotal polyacrylate mass, which includes ingredients selected from thegroup including: amine content of 0.2-2.0% of total polyacrylate mass;carboxylic acid of 0.6-6.0% of total polyacrylate mass; and acombination of amine content of 0.1-1.0% and carboxylic acid of 0.3-3.0%of total polyacrylate mass.

When a microcapsule's shell includes a polyacrylate material, and theshell has an overall mass, the polyacrylate material may form 5-100% ofthe overall mass, or any integer value for percentage in this range, orany range formed by any of these values for percentage. As examples, thepolyacrylate material may form at least 5%, at least 10%, at least 25%,at least 33%, at least 50%, at least 70%, or at least 90% of the overallmass.

Some or all of the microcapsules may have various shell thicknesses. Forat least a first group of the provided microcapsules, each microcapsulemay have a shell with an overall thickness of 1-300 nanometers, or anyinteger value for nanometers in this range, or any range formed by anyof these values for thickness. As an example, microcapsules may have ashell with an overall thickness of 2-200 nanometers.

The microcapsules may also encapsulate one or more benefit agents. Thebenefit agent(s) include, but are not limited to, cooling sensates,warming sensates, perfume oils, oils, pigments, dyes, chromogens, phasechange materials, and other kinds of benefit agent known in the art, inany combination. In some examples, the perfume oil encapsulated may havea ClogP of less than 4.5 or a ClogP of less than 4. Alternatively theperfume oil encapsulated may have a ClogP of less than 3. In someexamples, the microcapsule may be anionic, cationic, zwitterionic, orhave a neutral charge. The benefit agents(s) may be in the form ofsolids and/or liquids. The benefit agent(s) may be any kind of perfumeoil(s) known in the art, in any combination.

The microcapsules may encapsulate a partitioning modifier in addition tothe benefit agent. Non-limiting examples of partitioning modifiersinclude isopropyl myristate, mono-, di-, and tri-esters of C₄-C₂₄ fattyacids, castor oil, mineral oil, soybean oil, hexadecanoic acid, methylester isododecane, isoparaffin oil, polydimethylsiloxane, brominatedvegetable oil, and combinations thereof. U.S. 2011-0268802 disclosesother non-limiting examples of microcapsules and partitioning modifiersand is hereby incorporated by reference.

The microcapsule's shell may comprise a reaction product of a firstmixture in the presence of a second mixture comprising an emulsifier,the first mixture comprising a reaction product of i) an oil soluble ordispersible amine with ii) a multifunctional acrylate or methacrylatemonomer or oligomer, an oil soluble acid and an initiator, theemulsifier comprising a water soluble or water dispersible acrylic acidalkyl acid copolymer, an alkali or alkali salt, and optionally a waterphase initiator. In some examples, said amine is an aminoalkyl acrylateor aminoalkyl methacrylate.

The microcapsules may include a core material and a shell surroundingthe core material, wherein the shell comprises: a plurality of aminemonomers selected from the group consisting of aminoalkyl acrylates,alkyl aminoalkyl acrylates, dialkyl aminoalykl acrylates, aminoalkylmethacrylates, alkylamino aminoalkyl methacrylates, dialkyl aminoalyklmethacrylates, tertiarybutyl aminethyl methacrylates, diethylaminoethylmethacrylates, dimethylaminoethyl methacrylates, dipropylaminoethylmethacrylates, and mixtures thereof; and a plurality of multifunctionalmonomers or multifunctional oligomers. Non-limiting examples ofemulsifiers include water-soluble salts of alkyl sulfates, alkyl ethersulfates, alkyl isothionates, alkyl carboxylates, alkyl sulfosuccinates,alkyl succinamates, alkyl sulfate salts such as sodium dodecyl sulfate,alkyl sarcosinates, alkyl derivatives of protein hydrolyzates, acylaspartates, alkyl or alkyl ether or alkylaryl ether phosphate esters,sodium dodecyl sulphate, phospholipids or lecithin, or soaps, sodium,potassium or ammonium stearate, oleate or palmitate, alkylarylsulfonicacid salts such as sodium dodecylbenzenesulfonate, sodiumdialkylsulfosuccinates, dioctyl sulfosuccinate, sodiumdilaurylsulfosuccinate, poly(styrene sulfonate) sodium salt,isobutylene-maleic anhydride copolymer, gum arabic, sodium alginate,carboxymethylcellulose, cellulose sulfate and pectin, poly(styrenesulfonate), isobutylene-maleic anhydride copolymer, gum arabic,carrageenan, sodium alginate, pectic acid, tragacanth gum, almond gumand agar; semi-synthetic polymers such as carboxymethyl cellulose,sulfated cellulose, sulfated methylcellulose, carboxymethyl starch,phosphated starch, lignin sulfonic acid; and synthetic polymers such asmaleic anhydride copolymers (including hydrolyzates thereof),polyacrylic acid, polymethacrylic acid, acrylic acid butyl acrylatecopolymer or crotonic acid homopolymers and copolymers,vinylbenzenesulfonic acid or 2-acrylamido-2-methylpropanesulfonic acidhomopolymers and copolymers, and partial amide or partial ester of suchpolymers and copolymers, carboxymodified polyvinyl alcohol, sulfonicacid-modified polyvinyl alcohol and phosphoric acid-modified polyvinylalcohol, phosphated or sulfated tristyrylphenol ethoxylates,palmitamidopropyltrimonium chloride (Varisoft PATC™, available fromDegussa Evonik, Essen, Germany), distearyl dimonium chloride,cetyltrimethylammonium chloride, quaternary ammonium compounds, fattyamines, aliphatic ammonium halides, alkyldimethylbenzylammonium halides,alkyldimethylethylammonium halides, polyethyleneimine,poly(2-dimethylamino)ethyl methacrylate) methyl chloride quaternarysalt, poly(l-vinylpyrrolidone-co-2-dimethylaminoethyl methacrylate),poly(acrylamide-co-diallyldimethylammonium chloride), poly(allylamine),poly[bis(2-chloroethyl) ether-alt-1,3-bis[3-(dimethylamino)propyl]urea]quaternized, andpoly(dimethylamine-co-epichlorohydrin-co-ethylenediamine), condensationproducts of aliphatic amines with alkylene oxide, quaternary ammoniumcompounds with a long-chain aliphatic radical, e.g. distearyldiammoniumchloride, and fatty amines, alkyldimethylbenzylammonium halides,alkyldimethylethylammonium halides, polyalkylene glycol ether,condensation products of alkyl phenols, aliphatic alcohols, or fattyacids with alkylene oxide, ethoxylated alkyl phenols, ethoxylatedarylphenols, ethoxylated polyaryl phenols, carboxylic esters solubilizedwith a polyol, polyvinyl alcohol, polyvinyl acetate, or copolymers ofpolyvinyl alcohol polyvinyl acetate, polyacrylamide,poly(N-isopropylacrylamide), poly(2-hydroxypropyl methacrylate),poly(2-ethyl-2-oxazoline), poly(2-isopropenyl-2-oxazoline-co-methylmethacrylate), poly(methyl vinyl ether), and polyvinylalcohol-co-ethylene), and cocoamidopropyl betaine.

Processes for making microcapsules are well known. Various processes formicroencapsulation, and exemplary methods and materials, are set forthin U.S. Pat. No. 6,592,990; U.S. Pat. No. 2,730,456; U.S. Pat. No.2,800,457; U.S. Pat. No. 2,800,458; U.S. Pat. No. 4,552,811; and U.S.2006/0263518 A1.

The microcapsule may be spray-dried to form spray-dried microcapsules.The composition may also contain one or more additional delivery systemsfor providing one or more benefit agents, in addition to themicrocapsules. The additional delivery system(s) may differ in kind fromthe microcapsules. For example, wherein the microcapsule encapsulates aperfume oil, the additional delivery system may be an additionalfragrance delivery system, such as a moisture-triggered fragrancedelivery system. Non-limiting examples of moisture-triggered fragrancedelivery systems include cyclic oligosaccaride, starch (or otherpolysaccharide material), starch derivatives, and combinations thereof.Said polysaccharide material may or may not be modified.

The plurality of microcapsules may include anionic, cationic, andnon-ionic microcapsules, in any combination, when included in acomposition with a pH range of from 2 to about 10, alternatively fromabout 3 to about 9, alternatively from about 4 to about 8.

In some examples, the microcapsules may include a benefit agentcomprising: a.) a perfume composition having a ClogP of less than 4.5;b.) a perfume composition comprising, based on total perfume compositionweight, 60% perfume materials having a ClogP of less than 4.0; c.) aperfume composition comprising, based on total perfume compositionweight, 35% perfume materials having a ClogP of less than 3.5; d.) aperfume composition comprising, based on total perfume compositionweight, 40% perfume materials having a ClogP of less than 4.0 and atleast 1% perfume materials having a ClogP of less than 2.0; e.) aperfume composition comprising, based on total perfume compositionweight, 40% perfume materials having a ClogP of less than 4.0 and atleast 15% perfume materials having a ClogP of less than 3.0; f.) aperfume composition comprising, based on total perfume compositionweight, at least 1% butanoate esters and at least 1% of pentanoateesters; g.) a perfume composition comprising, based on total perfumecomposition weight, at least 2% of an ester comprising an allyl moietyand at least 10% of another perfume comprising an ester moiety; h.) aperfume composition comprising, based on total perfume compositionweight, at least 1% of an aldehyde comprising an alkyl chain moiety; i.)a perfume composition comprising, based on total perfume compositionweight, at least 2% of a butanoate ester; j.) a perfume compositioncomprising, based on total perfume composition weight, at least 1% of apentanoate ester; k.) a perfume composition comprising, based on totalperfume composition weight, at least 3% of an ester comprising an allylmoiety and 1% of an aldehyde comprising an alkyl chain moiety; l.) aperfume composition comprising, based on total perfume compositionweight, at least 25% of a perfume comprising an ester moiety and 1% ofan aldehyde comprising an alkyl chain moiety; m.) a perfume compositionscomprising, based on total perfume composition weight, at least 2% of amaterial selected from 4-(2,6,6-trimethyl-1-cyclohexenyl)-3-buten-2-one,4-(2,6,6-trimethyl-2-cyclohexenyl)-3-buten-2-one and 3-buten-2-one,3-methyl-4-(2,6,6-trimethyl-1-cyclohexen-2-yl)- and mixtures thereof;n.) a perfume composition comprising, based on total perfume compositionweight, at least 0.1% of tridec-2-enonitrile, and mandaril, and mixturesthereof; o.) a perfume composition comprising, based on total perfumecomposition weight, at least 2% of a material selected from3,7-dimethyl-6-octene nitrile, 2-cyclohexylidene-2-phenylacetonitrileand mixtures thereof; p.) a perfume composition comprising, based ontotal perfume composition weight, at least 80% of one or more perfumescomprising a moiety selected from the group consisting of esters,aldehydes, ionones, nitriles, ketones and combinations thereof; q.) aperfume composition comprising, based on total perfume compositionweight, at least 3% of an ester comprising an allyl moiety; a perfumecomposition comprising, based on total perfume composition weight, atleast 20% of a material selected from the group consisting of:1-methylethyl-2-methylbutanoate; ethyl-2-methyl pentanoate;1,5-dimethyl-1-ethenylhexyl-4-enyl acetate; p-menth-1-en-8-yl acetate;4-(2,6,6-trimethyl-2-cyclohexenyl)-3-buten-2-one;4-acetoxy-3-methoxy-1-propenylbenzene; 2-propenyl cyclohexanepropionate;bicyclo[2.2.1]hept-5-ene-2-carboxylic acid, 3-(1-methylethyl)-ethylester; bicyclo[2.2.1]heptan-2-ol, 1,7,7-trimethyl-, acetate;1,5-dimethyl-1-ethenylhex-4-enylacetate; hexyl 2-methyl propanoate;ethyl-2-methylbutanoate; 4-undecanone; 5-heptyldihydro-2(3h)-furanone;1,6-nonadien-3-ol, 3,7dimethyl-; 3,7-dimethylocta-1,6-dien-3-o;3-cyclohexene-1-carboxaldehyde, dimethyl-; 3,7-dimethyl-6-octenenitrile; 4-(2,6,6-trimethyl-1-cyclohexenyl)-3-buten-2-one;tridec-2-enonitrile; patchouli oil; ethyl tricycle[5.2.1.0]decan-2-carboxylate; 2,2-dimethyl-cyclohexanepropanol; hexylethanoate, 7-acetyl,1,2,3,4,5,6,7,8-octahydro-1,1,6,7-tetramethylnaphtalene; allyl-cyclohexyloxy acetate; methyl nonyl acetic aldehyde;1-spiro[4,5]dec-7-en-7-yl-4-pentenen-1-one; 7-octen-2-ol,2-methyl-6-methylene-dihydro; cyclohexanol, 2-(1,1-dimethylethyl)-,acetate; hexahydro-4,7-methanoinden-5(6)-ylpropionatehexahydro-4,7-methanoinden-5(6)-yl propionate;2-methoxynaphtalene; 1-(2,6,6-trimethyl-3-cyclohexenyl)-2-buten-1-one;1-(2,6,6-trimethyl-2-cyclohexenyl)-2-buten-1-one;3,7-dimethyloctan-3-ol; 3-buten-2-one,3-methyl-4-(2,6,6-trimethyl-1-cyclohexen-2-yl)-; hexanoic acid,2-propenyl ester; (z)-non-6-en-1-al; 1-decyl aldehyde; 1-octanal;4-t-butyl-methylhydrocinnamaldehyde; alpha-hexylcinnamaldehyde;ethyl-2,4-hexadienoate; 2-propenyl 3-cyclohexanepropanoate; and mixturesthereof; r.) a perfume composition comprising, based on total perfumecomposition weight, at least 20% of a material selected from the groupconsisting of: 1-methylethyl-2-methylbutanoate; ethyl-2-methylpentanoate; 1,5-dimethyl-1-ethenylhex-4-enyl acetate; p-menth-1-en-8-ylacetate; 4-(2,6,6-trimethyl-2-cyclohexenyl)-3-buten-2-one;4-acetoxy-3-methoxy-1-propenylbenzene; 2-propenyl cyclohexanepropionate;bicyclo[2.2.1]hept-5-ene-2-carboxylic acid, 3-(1-methylethyl)-ethylester; bicyclo [2.2.1]heptan-2-ol, 1,7,7-trimethyl-, acetate;1,5-dimethyl-1-ethenylhex-4-enyl acetate; hexyl 2-methyl propanoate;ethyl-2-methylbutanoate, 4-undecanolide; 5-heptyldihydro-2(3h)-furanone;5-hydroxydodecanoic acid; decalactones; undecalactones,1,6-nonadien-3-ol, 3,7dimethyl-; 3,7-dimethylocta-1,6-dien-3-ol;3-cyclohexene-1-carboxaldehyde, dimethyl-; 3,7-dimethyl-6-octenenitrile; 4-(2,6,6-trimethyl-1-cyclohexenyl)-3-buten-2-one;tridec-2-enonitrile; patchouli oil; ethyl tricycle[5.2.1.0]decan-2-carboxylate; 2,2-dimethyl-cyclohexanepropanol;allyl-cyclohexyloxy acetate; methyl nonyl acetic aldehyde;1-spiro[4,5]dec-7-en-7-yl-4-pentenen-1-one; 7-octen-2-ol,2-methyl-6-methylene-dihydro, cyclohexanol, 2-(1,1-dimethylethyl)-,acetate; hexahydro-4,7-methanoinden-5(6)-ylpropionatehexahydro-4,7-methanoinden-5(6)-yl propionate;2-methoxynaphtalene; 1-(2,6,6-trimethyl-3-cyclohexenyl)-2-buten-1-one;1-(2,6,6-trimethyl-2-cyclohexenyl)-2-buten-1-one;3,7-dimethyloctan-3-ol; 3-buten-2-one,3-methyl-4-(2,6,6-trimethyl-1-cyclohexen-2-yl)-; hexanoic acid,2-propenyl ester; (z)-non-6-en-1-al; 1-decyl aldehyde; 1-octanal;4-t-butyl-methylhydrocinnamaldehyde; ethyl-2,4-hexadienoate; 2-propenyl3-cyclohexanepropanoate; and mixtures thereof; s.) a perfume compositioncomprising, based on total perfume composition weight, at least 5% of amaterial selected from the group consisting of3-cyclohexene-1-carboxaldehyde, dimethyl-; 3-buten-2-one,3-methyl-4-(2,6,6-trimethyl-1-cyclohexen-2-yl)-; patchouli oil; Hexanoicacid, 2-propenyl ester; 1-Octanal; 1-decyl aldehyde; (z)-non-6-en-1-al;methyl nonyl acetic aldehyde; ethyl-2-methylbutanoate;1-methylethyl-2-methylbutanoate; ethyl-2-methyl pentanoate;4-hydroxy-3-ethoxybenzaldehyde; 4-hydroxy-3-methoxybenzaldehyde;3-hydroxy-2-methyl-4-pyrone; 3-hydroxy-2-ethyl-4-pyrone and mixturesthereof; t.) a perfume composition comprising, based on total perfumecomposition weight, less than 10% perfumes having a ClogP greater than5.0; u.) a perfume composition comprising geranyl palmitate; or v.) aperfume composition comprising a first and an optional second material,said first material having: (i) a ClogP of at least 2; (ii) a boilingpoint of less than about 280° C.; and second optional second material,when present, having (i) a ClogP of less than 2.5; and (ii) a ODT ofless than about 100 ppb.

In some examples, the microcapsules may include a benefit agentcomprising: one or more materials selected from the group consisting of(5-methyl-2-propan-2-ylcyclohexyl) acetate; 3,7-dimethyloct-6-en-1-al;2-(phenoxy)ethyl 2-methylpropanoate; prop-2-enyl2-(3-methylbutoxy)acetate; 3-methyl-1-isobutylbutyl acetate; prop-2-enylhexanoate; prop-2-enyl 3-cyclohexylpropanoate; prop-2-enyl heptanoate;(E)-1-(2,6,6-trimethyl-1-cyclohex-2-enyl)but-2-en-1-one;(E)-4-(2,6,6-trimethyl-1-cyclohex-2-enyl)but-3-en-2-one;(E)-3-methyl-4-(2,6,6-trimethyl-1-cyclohex-2-enyl)but-3-en-2-one;1-(2,6,6-trimethyl-1-cyclohex-2-enyl)pent-1-en-3-one;6,6,9a-trimethyl-1,2,3a,4,5,5a,7,8,9,9b-decahydronaphtho[2,1-b]furan;pentyl 2-hydroxybenzoate; 7,7-dimethyl-2-methylidene-norbornane;(E)-1-(2,6,6-trimethyl-1-cyclohexenyl)but-2-en-1-one;(E)-4-(2,6,6-trimethyl-1-cyclohexenyl)but-3-en-2-one;4-ethoxy-4,8,8-trimethyl-9-methylidenebicyclo[3.3.1]nonane;(1,7,7-trimethyl-6-bicyclo[2.2.1]heptanyl) acetate;3-(4-tert-butylphenyl)propanal;1,1,2,3,3-pentamethyl-2,5,6,7-tetrahydroinden-4-one;2-oxabicyclo2.2.2octane, 1methyl4(2,2,3trimethylcyclopentyl);[(Z)-hex-3-enyl] acetate; [(Z)-hex-3-enyl] 2-methylbutanoate;cis-3-hexenyl 2-hydroxybenzoate; 3,7-dimethylocta-2,6-dienal;3,7-dimethyloct-6-en-1-al; 3,7-dimethyl-6-octen-1-ol;3,7-dimethyloct-6-enyl acetate; 3,7-dimethyloct-6-enenitrile;2-(3,7-dimethyloct-6-enoxy)acetaldehyde;tetrahydro-4-methyl-2-propyl-2h-pyran-4-yl acetate; ethyl3-phenyloxirane-2-carboxylate; hexahydro-4,7-methano-indenylisobutyrate; 2,4-dimethylcyclohex-3-ene-1-carbaldehyde;hexahydro-4,7-methano-indenyl propionate; 2-cyclohexylethyl acetate;2-pentylcyclopentan-1-ol;(2R,3R,4S,5S,6R)-2-[(2R,3S,4R,5R,6R)-6-(6-cyclohexylhexoxy)-4,5-dihydroxy-2-(hydroxymethyl)oxan-3-yl]oxy-6-(hydroxymethyl)oxane-3,4,5-triol;(E)-1-(2,6,6-trimethyl-1-cyclohexa-1,3-dienyl)but-2-en-1-one;1-cyclohexylethyl (E)-but-2-enoate; dodecanal;(E)-1-(2,6,6-trimethyl-1-cyclohex-3-enyl)but-2-en-1-one;(5E)-3-methylcyclopentadec-5-en-1-one;4-(2,6,6-trimethyl-1-cyclohex-2-enyl)butan-2-one;2-methoxy-4-propylphenol; methyl2-hexyl-3-oxocyclopentane-1-carboxylate; 2,6-dimethyloct-7-en-2-ol;4,7-dimethyloct-6-en-3-one;4-(octahydro-4,7-methano-5H-inden-5-yliden)butanal; acetaldehyde ethyllinalyl acetal; ethyl 3,7-dimethyl-2,6-octadienoate; ethyl2,6,6-trimethylcyclohexa-1,3-diene-1-carboxylate; 2-ethylhexanoate;(6E)-3,7-dimethylnona-1,6-dien-3-ol; ethyl 2-methylbutanoate; ethyl2-methylpentanoate; ethyl tetradecanoate; ethyl nonanoate; ethyl3-phenyloxirane-2-carboxylate; 1,4-dioxacycloheptadecane-5,17-dione;1,3,3-trimethyl-2-oxabicyclo[2,2,2]octane; [essential oil];oxacyclo-hexadecan-2-one; 3-(4-ethylphenyl)-2,2-dimethylpropanal;2-butan-2-ylcyclohexan-1-one; 1,4-cyclohexandicarboxylic acid, diethylester;(3aalpha,4beta,7beta,7aalpha)-octahydro-4,7-methano-3aH-indene-3a-carboxylicacid ethyl ester; hexahydro-4-7, menthano-1H-inden-6-yl propionate;2-butenon-1-one, 1-(2,6-dimethyl-6-methylencyclohexyl)-;(E)-4-(2,2-dimethyl-6-methylidenecyclohexyl)but-3-en-2-one;1-methyl-4-propan-2-ylcyclohexa-1,4-diene; 5-heptyloxolan-2-one;3,7-dimethylocta-2,6-dien-1-ol; [(2E)-3,7-dimethylocta-2,6-dienyl]acetate; [(2E)-3,7-dimethylocta-2,6-dienyl] octanoate; ethyl2-ethyl-6,6-dimethylcyclohex-2-ene-1-carboxylate;(4-methyl-1-propan-2-yl-1-cyclohex-2-enyl) acetate;2-butyl-4,6-dimethyl-5,6-dihydro-2H-pyran; oxacyclohexadecen-2-one;1-propanol, 2-[1-(3,3-dimethyl-cyclohexyl)ethoxy]-2-methylpropanoate;1-heptyl acetate; 1-hexyl acetate; hexyl 2-methylpropanoate;(2-(1-ethoxyethoxy)ethyl)benzene;4,4a,5,9b-tetrahydroindeno[1,2-d][1,3]dioxine; undec-10-enal;3-methyl-4-(2,6,6-trimethyl-2-cyclohexen-1-yl)-3-buten-2-one;1-(1,2,3,4,5,6,7,8-octahydro-2,3,8,8-tetramethyl-2-naphthalenyl)-ethan-1-one;7-acetyl,1,2,3,4,5,6,7-octahydro-1,1,6,7,-tetra methyl naphthalene;3-methylbutyl 2-hydroxybenzoate;[(1R,4S,6R)-1,7,7-trimethyl-6-bicyclo[2.2.1]heptanyl] acetate; [(1R,4R,6R)-1,7,7-trimethyl-6-bicyclo[2.2.1]heptanyl] 2-methylpropanoate;(1,7,7-trimethyl-5-bicyclo[2.2.1]heptanyl) propanoate; 2-methylpropylhexanoate; [2-methoxy-4-[(E)-prop-1-enyl]phenyl] acetate;2-hexylcyclopent-2-en-1-one; 5-methyl-2-propan-2-ylcyclohexan-1-one;7-methyloctyl acetate; propan-2-yl 2-methylbutanoate;3,4,5,6,6-pentamethylheptenone-2;hexahydro-3,6-dimethyl-2(3H)-benzofuranone;2,4,4,7-tetramethyl-6,8-nonadiene-3-one oxime; dodecyl acetate;[essential oil]; 3,7-dimethylnona-2,6-dienenitrile;[(Z)-hex-3-enyl]methyl carbonate;2-methyl-3-(4-tert-butylphenyl)propanal; 3,7-dimethylocta-1,6-dien-3-ol;3,7-dimethylocta-1,6-dien-3-yl acetate; 3,7-dimethylocta-1,6-dien-3-ylbutanoate; 3,7-dimethylocta-1,6-dien-3-yl formate;3,7-dimethylocta-1,6-dien-3-yl 2-methylpropanoate;3,7-dimethylocta-1,6-dien-3-yl propanoate;3-methyl-7-propan-2-ylbicyclo[2.2.2]oct-2-ene-5-carbaldehyde;2,2-dimethyl-3-(3-methylphenyl)propan-1-ol; 3-(4-tert-butylphenyl)butanal; 2,6-dimethylhept-5-enal; 5-methyl-2-propan-2-yl-cyclohexan-1-ol;1-(2,6,6-trimethyl-1-cyclohexenyl)pent-1-en-3-one; methyl3-oxo-2-pentylcyclopentaneacetate; methyl tetradecanoate;2-methylundecanal; 2-methyldecanal;1,1-dimethoxy-2,2,5-trimethyl-4-hexene;[(1S)-3-(4-methylpent-3-enyl)-1-cyclohex-3-enyl]methyl acetate;2-(2-(4-methyl-3-cyclohexen-1-yl)propyl)cyclo-pentanone; 4-penten-1-one,1-(5,5-dimethyl-1-cyclohexen-1-yl; 1H-indene-ar-propanal,2,3,-dihydro-1,1-dimethyl-(9CI); 2-ethoxynaphthalene; nonanal;2-(7,7-dimethyl-4-bicyclo[3.1.1]hept-3-enyl)ethyl acetate; octanal;4-(1-methoxy-1-methylethyl)-1-methylcyclohexene;(2-tert-butylcyclohexyl) acetate;(E)-1-ethoxy-4-(2-methylbutan-2-yl)cyclohexane; 1,1-dimethoxynon-2-yne;[essential oil]; 2-cyclohexylidene-2-phenylacetonitrile;2-cyclohexyl-1,6-heptadien-3-one; 4-cyclohexyl-2-methylbutan-2-ol;2-phenylethyl 2-phenylacetate; (2E, 5E/Z)-5,6,7-trimethylocta-2,5-dien-4-one;1-methyl-3-(4-methylpent-3-enyl)cyclohex-3-ene-1-carbaldehyde; methyl2,2-dimethyl-6-methylidenecyclohexane-1-carboxylate;1-(3,3-dimethylcyclohexyl)ethyl acetate;4-methyl-2-(2-methylprop-1-enyl)oxane;1-spiro(4.5)-7-decen-7-yl-4-penten-1-one;4-(2-butenylidene)-3,5,5-trimethylcyclohex-2-en-1-one;2-(4-methyl-1-cyclohex-3-enyl)propan-2-ol;4-isopropylidene-1-methyl-cyclohexene;2-(4-methyl-1-cyclohex-3-enyl)propan-2-yl acetate;3,7-dimethyloctan-3-ol; 3,7-dimethyloctan-3-ol; 3,7-dimethyloctan-3-ylacetate; 3-phenylbutanal; (2,5-dimethyl-4-oxofuran-3-yl) acetate;4-methyl-3-decen-5-ol; undec-10-enal; (4-formyl-2-methoxyphenyl)2-methylpropanoate; 2,2,5-trimethyl-5-pentylcyclopentan-1-one;2-tert-butylcyclohexan-1-ol; (2-tert-butylcyclohexyl) acetate;4-tert-butylcyclohexyl acetate;1-(3-methyl-7-propan-2-yl-6-bicyclo[2.2.2]oct-3-enyl)ethanone;(4,8-dimethyl-2-propan-2-ylidene-3,3a,4,5,6,8a-hexahydro-1H-azulen-6-yl)acetate; [(4Z)-1-cyclooct-4-enyl] methyl carbonate; methyl beta naphtylether; materials and stereoisomers thereof.

The compositions may also include a parent fragrance and one or moreencapsulated fragrances that may or may not differ from the parentfragrance. For example, the composition may include a parent fragranceand a non-parent fragrance. A parent fragrance refers to a fragrancethat is dispersed throughout the composition and is typically notencapsulated when added to the composition. Herein, a non-parentfragrance refers to a fragrance that differs from a parent fragranceincluded within the composition and is encapsulated with anencapsulating material prior to inclusion into the composition.Non-limiting examples of differences between a fragrance and anon-parent fragrance include differences in chemical make-up. In someexamples, dried microcapsules may be incorporated into the composition,prepared by spray drying, fluid bed drying, tray drying, or other suchdrying processes that are available.

Suspending Agents

The compositions described herein may include one or more suspendingagents to suspend the microcapsules and other water-insoluble materialdispersed in the composition. The concentration of the suspending agentmay range from about 0.01% to about 90%, alternatively from about 0.01%to 15% by weight of the composition.

Non-limiting examples of suspending agents include anionic polymers,cationic polymers, and nonionic polymers. Non-limiting examples of saidpolymers include vinyl polymers such as cross linked acrylic acidpolymers with the CTFA name Carbomer, cellulose derivatives and modifiedcellulose polymers such as methyl cellulose, ethyl cellulose,hydroxyethyl cellulose, hydroxypropyl methyl cellulose, nitro cellulose,sodium cellulose sulfate, sodium carboxymethyl cellulose, crystallinecellulose, cellulose powder, polyvinylpyrrolidone, polyvinyl alcohol,guar gum, hydroxypropyl guar gum, xanthan gum, arabia gum, tragacanth,galactan, carob gum, guar gum, karaya gum, carrageenan, pectin, agar,quince seed (Cydonia oblonga Mill), starch (rice, corn, potato, wheat),algae colloids (algae extract), microbiological polymers such asdextran, succinoglucan, pulleran, starch-based polymers such ascarboxymethyl starch, methylhydroxypropyl starch, alginic acid-basedpolymers such as sodium alginate and alginic acid, propylene glycolesters, acrylate polymers such as sodium polyacrylate,polyethylacrylate, polyacrylamide, and polyethyleneimine, and inorganicwater soluble material such as bentonite, aluminum magnesium silicate,laponite, hectonite, and anhydrous silicic acid. Other suspending agentsmay include, but are not limited to, Konjac, Gellan, and a methyl vinylether/maleic anhydride copolymer crosslinked with decadiene (e.g.Stabileze®).

Other non-limiting examples of suspending agents include cross-linkedpolyacrylate polymers like Carbomers with the trade names Carbopol® 934,Carbopol® 940, Carbopol® 950, Carbopol® 980, Carbopol® 981, Carbopol®Ultrez 10, Carbopol® Ultrez 20, Carbopol® Ultrez 21, Carbopol® Ultrez30, Carbopol® ETD2020, Carbopol® ETD2050, Pemulen® TR-1, and Pemulen®TR-2, available from The Lubrizol Corporation; acrylates/steareth-20methacrylate copolymer with trade name ACRYSOL™ 22 available from Rohmand Hass; acrylates/beheneth-25 methacrylate copolymers, trade namesincluding Aculyn-28 available from Rohm and Hass, and Volarest™ FLavailable from Croda; nonoxynyl hydroxyethylcellulose with the tradename Amercell™ POLYMER HM-1500 available from Amerchol; methylcellulosewith the trade name BENECEL®, hydroxyethyl cellulose with the trade nameNATROSOL®; hydroxypropyl cellulose with the trade name KLUCEL®; cetylhydroxyethyl cellulose with the trade name POLYSURF® 67, supplied byHercules; ethylene oxide and/or propylene oxide based polymers with thetrade names CARBOWAX® PEGs, POLYOX WASRs, and UCON® FLUIDS, all suppliedby Amerchol; ammonium acryloyldimethyltaurate/carboxyethyl-acrylate-crosspolymers like Aristoflex® TACcopolymer, ammonium acryloyl dimethyltaurate/VP copolymers likeAristoflex® AVS copolymer, sodium acryloyl dimethyltaurate/VPcrosspolymers like Aristoflex® AVS copolymer, ammonium acryloyldimethyltaurate/beheneth-25 methacrylate crosspolymers like Aristoflex®BVL or HMB, all available from Clariant Corporation; polyacrylatecrosspolymer-6 with the trade name Sepimax™ Zen, available from Seppic;and cross-linked copolymers of vinyl pyrrolidone and acrylic acid suchas UltraThix™ P-100 polymer available from Ashland.

Other non-limiting examples of suspending agents include crystallinesuspending agents which can be categorized as acyl derivatives, longchain amine oxides, and mixtures thereof.

Other non-limiting examples of suspending agents include ethylene glycolesters of fatty acids, in some aspects those having from about 16 toabout 22 carbon atoms; ethylene glycol stearates, both mono anddistearate, in some aspects, the distearate containing less than about7% of the mono stearate; alkanol amides of fatty acids, having fromabout 16 to about 22 carbon atoms, or about 16 to 18 carbon atoms,examples of which include stearic monoethanolamide, stearicdiethanolamide, stearic monoisopropanolamide and stearicmonoethanolamide stearate; long chain acyl derivatives including longchain esters of long chain fatty acids (e.g., stearyl stearate, cetylpalmitate, etc.); long chain esters of long chain alkanol amides (e.g.,stearamide diethanolamide distearate, stearamide monoethanolamidestearate); and glyceryl esters (e.g., glyceryl distearate,trihydroxystearin, tribehenin), a commercial example of which is Thixin®R available from Rheox, Inc. Other non-limiting examples of suspendingagents include long chain acyl derivatives, ethylene glycol esters oflong chain carboxylic acids, long chain amine oxides, and alkanol amidesof long chain carboxylic acids.

Other non-limiting examples of suspending agents include long chain acylderivatives including N,N-dihydrocarbyl amido benzoic acid and solublesalts thereof (e.g., Na, K), particularly N,N-di(hydrogenated) C₁₆, C₁₈and tallow amido benzoic acid species of this family, which arecommercially available from Stepan Company (Northfield, Ill., USA).

Non-limiting examples of suitable long chain amine oxides for use assuspending agents include alkyl dimethyl amine oxides (e.g., stearyldimethyl amine oxide).

Other non-limiting suitable suspending agents include primary amineshaving a fatty alkyl moiety having at least about 16 carbon atoms,examples of which include palmitamine or stearamine, and secondaryamines having two fatty alkyl moieties each having at least about 12carbon atoms, examples of which include dipalmitoylamine ordi(hydrogenated tallow)amine. Other non-limiting examples of suspendingagents include di(hydrogenated tallow)phthalic acid amide, andcross-linked maleic anhydride-methyl vinyl ether copolymer.

Coloring Agents

The compositions herein may include a coloring agent. A coloring agentmay be in the form of a pigment. As used herein, the term “pigment”means a solid that reflects light of certain wavelengths while absorbinglight of other wavelengths, without providing appreciable luminescence.Useful pigments include, but are not limited to, those which areextended onto inert mineral(s) (e.g., talk, calcium carbonate, clay) ortreated with silicone or other coatings (e.g., to prevent pigmentparticles from re-agglomerating or to change the polarity(hydrophobicity) of the pigment. Pigments may be used to impart opacityand color. Any pigment that is generally recognized as safe (such asthose listed in C.T.F.A. cosmetic Ingredient Handbook, 3^(rd) Ed.,cosmetic and Fragrance Association, Inc., Washington, D.C. (1982),herein incorporated by reference) may be included in the compositionsdescribed herein. Non-limiting examples of pigments include bodypigment, inorganic white pigment, inorganic colored pigment, pearlingagent, and the like. Non-limiting examples of pigments include talc,mica, magnesium carbonate, calcium carbonate, magnesium silicate,aluminum magnesium silicate, silica, titanium dioxide, zinc oxide, rediron oxide, yellow iron oxide, black iron oxide, ultramarine,polyethylene powder, methacrylate powder, polystyrene powder, silkpowder, crystalline cellulose, starch, titanated mica, iron oxidetitanated mica, bismuth oxychloride, and the like. The aforementionedpigments can be used independently or in combination.

Other non-limiting examples of pigments include inorganic powders suchas gums, chalk, Fuller's earth, kaolin, sericite, muscovite, phlogopite,synthetic mica, lepidolite, biotite, lithia mica, vermiculite, aluminumsilicate, starch, smectite clays, alkyl and/or trialkyl aryl ammoniumsmectites, chemically modified magnesium aluminum silicate, organicallymodified montmorillonite clay, hydrated aluminum silicate, fumedaluminum starch octenyl succinate barium silicate, calcium silicate,magnesium silicate, strontium silicate, metal tungstate, magnesium,silica alumina, zeolite, barium sulfate, calcined calcium sulfate(calcined gypsum), calcium phosphate, fluorine apatite, hydroxyapatite,ceramic powder, metallic soap (zinc stearate, magnesium stearate, zincmyristate, calcium palmitate, and aluminum stearate), colloidal siliconedioxide, and boron nitride; organic powder such as polyamide resinpowder (nylon powder), cyclodextrin, methyl polymethacrylate powder,copolymer powder of styrene and acrylic acid, benzoguanamine resinpowder, poly(ethylene tetrafluoride) powder, and carboxyvinyl polymer,cellulose powder such as hydroxyethyl cellulose and sodium carboxymethylcellulose, ethylene glycol monostearate; inorganic white pigments suchas magnesium oxide. Non-limiting examples of pigments includenanocolorants from BASF and multi-layer interference pigments such asSicopearls from BASF. The pigments may be surface treated to provideadded stability of color and ease of formulation. Non-limiting examplesof pigments include aluminum, barium or calcium salts or lakes. Someother non-limiting examples of coloring agents include Red 3 AluminumLake, Red 21 Aluminum Lake, Red 27 Aluminum Lake, Red 28 Aluminum Lake,Red 33 Aluminum Lake, Yellow 5 Aluminum Lake, Yellow 6 Aluminum Lake,Yellow 10 Aluminum Lake, Orange 5 Aluminum Lake and Blue 1 AluminumLake, Red 6 Barium Lake, Red 7 Calcium Lake.

A coloring agent may also be a dye. Non-limiting examples include Red 6,Red 21, Brown, Russet and Sienna dyes, Yellow 5, Yellow 6, Red 33, Red4, Blue 1, Violet 2, and mixtures thereof. Other non-limiting examplesof dyes include fluorescent dyes like fluorescein.

Other Ingredients

The compositions may include other ingredients like antioxidants,ultraviolet inhibitors like sunscreen agents and physical sunblocks,cyclodextrins, quenchers, and/or skin care actives. Non-limitingexamples of other ingredients include 2-ethylhexyl-p-methoxycinnamate;hexyl 2-[4-(diethylamino)-2-hydroxybenzoyl]benzoate;4-tert-butyl-4′-methoxy dibenzoylmethane;2-hydroxy-4-methoxybenzo-phenone; 2-phenylbenzimidazole-5-sulfonic acid;octocrylene; zinc oxide; titanium dioxide; vitamins like vitamin C,vitamin B, vitamin A, vitamin E, and derivatives thereof; flavones andflavonoids; amino acids like glycine, tyrosine, etc.; carotenoids andcarotenes; chelating agents like EDTA, lactates, citrates, andderivatives thereof.

First and Second Compositions

The dispenser may include a first composition stored in a firstreservoir and a second composition stored in the second reservoir. Thesecond composition may include a volatile solvent and a first fragrance.The first composition may include a plurality of microcapsules and acarrier such as water. The first composition my further include asuspending agent. The first and second compositions may each furtherinclude any other ingredient listed herein unless such an ingredientnegatively affects the performance of the microcapsules. Non-limitingexamples of other ingredients include a coloring agent included in atleast one of the first and second compositions and at least onenon-encapsulated fragrance in the first composition or secondcomposition.

When the first comprises microcapsules encapsulating a fragrance, thefirst compositions may further include a non-encapsulated fragrance thatmay or may not differ from the encapsulated fragrance in chemicalmake-up. In some examples, the first composition may be substantiallyfree of a material selected from the group consisting of a propellant, avolatile solvent like ethanol, a detersive surfactant, and combinationsthereof; preferably free of a material selected from the groupconsisting of a propellant, a volatile solvent like ethanol, a detersivesurfactant, and combinations thereof. Non-limiting examples ofpropellants include compressed air, nitrogen, inert gases, carbondioxide, gaseous hydrocarbons like propane, n-butane, isobutene,cyclopropane, and mixtures thereof. In some examples, the secondcomposition may be substantially free of a material selected from thegroup consisting of a propellant, microcapsules, a detersive surfactant,and combinations thereof; preferably free of a material selected fromthe group consisting of propellant, microcapsules, a detersivesurfactant, and combinations thereof. At least some of the microcapsulesincluded in such a dispenser may encapsulate a fragrance. The fragranceencapsulated within the microcapsules may or may not differ in chemicalmake-up from the non-encapsulated fragrance included with the volatilesolvent.

In some examples, the first composition may include at least 50%, atleast 75%, or even at least 90%, by weight of the composition, of water;a plurality of microcapsules; and from about 0.01% to about 90%,preferably from about 0.01% to about 15%, more preferably from about0.5% to about 15%, by weight of the composition, of a suspending agent;wherein the composition is free of propellants, volatile solvents (e.g.ethanol), and detersive surfactants; wherein the microcapsules comprisea first fragrance and a shell that surrounds said first fragrance. Insome examples, the first composition may be substantially free of, oralternatively, free of a wax, an antiperspirant, and combinationsthereof. In some examples, the first composition may comprise about 20%or less, about 10% or less, about 7% or less, of the microcapsules. Itis to be appreciated that because the first composition is to beatomized, the concentration of the microcapsules in the firstcomposition should not be so high as to prevent suitable atomization.

Test Methods

It is understood that the test methods that are disclosed in the TestMethods Section of the present application should be used to determinethe respective values of the parameters of Applicants' invention as suchinvention is described and claimed herein.

(1) Fracture Strength

-   a.) Place 1 gram of particles in 1 liter of distilled deionized (DI)    water.-   b.) Permit the particles to remain in the DI water for 10 minutes    and then recover the particles by filtration.-   c.) Determine the average rupture force of the particles by    averaging the rupture force of 50 individual particles. The rupture    force of a particle is determined using the procedure given in    Zhang, Z.; Sun, G; “Mechanical Properties of Melamine-Formaldehyde    microcapsules,” J. Microencapsulation, vol 18, no. 5, pages    593-602, 2001. Then calculate the average fracture strength by    dividing the average rupture force (in Newtons) by the average    cross-sectional area of the spherical particle (πr², where r is the    radius of the particle before compression), said average    cross-sectional area being determined as follows:    -   (i) Place 1 gram of particles in 1 liter of distilled        deionized (DI) water.    -   (ii) Permit the particles to remain in the DI water for 10        minutes and then recover the particles by filtration.    -   (iii) Determine the particle size distribution of the particle        sample by measuring the particle size of 50 individual particles        using the experimental apparatus and method of Zhang, Z.; Sun,        G; “Mechanical Properties of MelamineFormaldehyde        microcapsules,” J. Microencapsulation, vol 18, no. 5, pages        593-602, 2001.    -   (iv) Average the 50 independent particle diameter measurements        to obtain an o average particle diameter.-   d.) For a capsule slurry, the sample is divided into three particle    size fractions covering the particle size distribution. Per particle    size fraction about 30 fracture strengths are determined.    (2) ClogP

The “calculated logP” (ClogP) is determined by the fragment approach ofHansch and Leo (cf., A. Leo, in Comprehensive Medicinal Chemistry, Vol.4, C. Hansch, P. G. Sammens, J. B. Taylor, and c. A. Ramsden, Eds. P.295, Pergamon Press, 1990, incorporated herein by reference). ClogPvalues may be calculated by using the “CLOGP” program available fromDaylight Chemical Information Systems Inc. of Irvine, Calif. U.S.A.

(3) Boiling Point

Boiling point is measured by ASTM method D2887-04a, “Standard TestMethod for Boiling Range Distribution of Petroleum Fractions by GasChromatography,” ASTM International.

(4) Volume Weight Fractions

Volume weight fractions are determined via the method of single-particleoptical sensing (SPOS), also called optical particle counting (OPC).Volume weight fractions are determined via an Accusizer 780/AD suppliedby Particle Sizing Systems of Santa Barbara Calif., U.S.A. orequivalent.

Procedure:

-   1) Put the sensor in a cold state by flushing water through the    sensor;-   2) Confirm background counts are less than 100 (if more than 100,    continue the flush)-   3) Prepare particle standard: pipette approx. 1 ml of shaken    particles into a blender filled with approx. 2 cups of DI water.    Blend it. Pipette approx. 1 ml of diluted, blended particles into 50    ml of DI water.-   4) Measure particle standard: pipette approx. 1 ml of double diluted    standard into Accusizer bulb. Press the start    measurement-Autodilution button. Confirm particles counts are more    than 9200 by looking in the status bar. If counts are less than    9200, press stop and 10 inject more sample.-   5) Immediately after measurement, inject one full pipette of soap    (5% Micro 90) into bulb and press the Start Automatic Flush Cycles    button.    (5) Volume Weighted Fracture Strength (VWFS)    VWFS=(fracture strength₁×volume fraction₁)+(fracture    strength₂×volume fraction₂)+(fracture strength₃×volume fraction₃)    Fracture strength₁=average fracture strength measured from a pool of    10 microcapsules (with similar particle size)    Volume fraction₁=volume fraction determined via Accusizer of    particle distribution corresponding to fracture strength₁

The spread around the fracture strength to determine the volume fractionis determined as follows:

For particle batches with a mean particle sizes of about 15 micrometersa spread of about 10 micrometers is used, for particle batches with amean particle sizes of about 30 micrometers and above, a spread of about10 to 15 micrometers is used.

Fracture Strength Mean Particle Determination at Volume Volume FractureParticle Batch Size 3 particle sizes Fractions Strength Melamine-based31 microns 21 micron, 1.8 MPa; 1 to 25 microns, 1.5 MPa polyurea 31micron, 30%; 25 to 36 1.6 MPa; 41 microns, 40%; micron, 1.2 MPa) 36 to50 microns, 30%(6) Benefit Agent Leakage Test

-   a.) Obtain 2, one gram samples of benefit agent particle    composition.-   b.) Add 1 gram (Sample 1) of particle composition to 99 grams of    product matrix that the particle will be employed in and with the    second sample immediately proceed to Step d below.-   c.) Age the particle containing product matrix (Sample 1) of a.)    above for 2 weeks at 35° C. in a sealed, glass jar.-   d.) Recover the particle composition's particles from the product    matrix of c.) (Sample 1 in product matrix) and from particle    composition (Sample 2) above by filtration.-   e.) Treat each particle sample from d.) above with a solvent that    will extract all the benefit agent from each samples' particles.-   f.) Inject the benefit agent containing solvent from each sample    from e.) above into a Gas Chromatograph and integrate the peak areas    to determine the total quantity of benefit agent extracted from each    sample.-   g.) The benefit agent leakage is defined as:

Value from f.) above for Sample 2−Value from f.) above for Sample 1.

(7) Test Method for Determining Median Volume-Weighted Particle Size ofMicrocapsules

One skilled in the art will recognize that various protocols may beconstructed for the extraction and isolation of microcapsules fromfinished products, and will recognize that such methods requirevalidation via a comparison of the resulting measured values, asmeasured before and after the microcapsules' addition to and extractionfrom the finished product. The isolated microcapsules are thenformulated in deionized water to form a capsule slurry forcharacterization for particle size distribution.

The median volume-weighted particle size of the microcapsules ismeasured using an Accusizer 780A, made by Particle Sizing Systems, SantaBarbara Calif., or equivalent. The instrument is calibrated from 0 to300 μm using particle size standards (as available fromDuke/Thermo-Fisher-Scientific Inc., Waltham, Mass., USA). Samples forparticle size evaluation are prepared by diluting about 1 g of capsuleslurry in about 5 g of de-ionized water and further diluting about 1 gof this solution in about 25 g of water. About 1 g of the most dilutesample is added to the Accusizer and the testing initiated using theautodilution feature. The Accusizer should be reading in excess of 9200counts/second. If the counts are less than 9200 additional sample shouldbe added. Dilute the test sample until 9200 counts/second and then theevaluation should be initiated. After 2 minutes of testing the Accusizerwill display the results, including the median volume-weighted particlesize.

EXAMPLES

The following examples are given solely for the purpose of illustrationand are not to be construed as limiting the invention, as manyvariations thereof are possible.

In the examples, all concentrations are listed as weight percent, unlessotherwise specified and may exclude minor materials such as diluents,filler, and so forth. The listed formulations, therefore, comprise thelisted components and any minor materials associated with suchcomponents. As is apparent to one of ordinary skill in the art, theselection of these minor materials will vary depending on the physicaland chemical characteristics of the particular ingredients selected tomake the present invention as described herein.

Example 1. Polyacrylate Microcapsule

An oil solution, consisting of 128.4 g Fragrance Oil, 32.1 g isopropylmyristate, 0.86 g DuPont Vazo-67, 0.69 g Wako Chemicals V-501, is addedto a 35° C. temperature controlled steel jacketed reactor, with mixingat 1000 rpm (4 tip, 2″ diameter, flat mill blade) and a nitrogen blanketapplied at 100 cc/min. The oil solution is heated to 70° C. in 45minutes, held at 75° C. for 45 minutes, and cooled to 50° C. in 75minutes. This will be called oil solution A.

In a reactor vessel, an aqueous solution is prepared consisting of 300 gdeionized water to which is dispersed 2.40 grams of Celvol 540 polyvinylalcohol at 25 degrees Centigrade. The mixture is heated to 85 degreesCentigrade and held there for 45 minutes. The solution is cooled to 30degrees Centigrade. 1.03 grams of Wako Chemicals V-501 initiator isadded, along with 0.51 grams of 40% sodium hydroxide solution. Heat thesolution to 50° C., and maintain the solution at that temperature.

To the oil solution A, add 0.19 grams of tert-butyl amino ethylmethacrylate (Sigma Aldrich), 0.19 grams of beta-carboxy ethyl acrylate(Sigma Aldrich), and 15.41 grams of Sartomer CN975 (Sartomer, Inc.). Mixthe acrylate monomers into the oil phase for 10 minutes. This will becalled oil solution B. Use a Caframo mixer with a 4-blade pitchedturbine agitator.

Start nitrogen blanket on top of the aqueous solution in reactor. Starttransferring the oil solution B into the aqueous solution in thereactor, with minimal mixing. Increase mixing to 1800-2500 rpm, for 60minutes to emulsify the oil phase into the water solution. After millingis completed, mixing is continued with a 3″ propeller at 350 rpm. Thebatch is held at 50° C. for 45 minutes, the temperature is increased to75° C. in 30 minutes, held at 75° C. for 4 hours, heated to 95° C. in 30minutes and held at 95° C. for 6 hours. The batch is then allowed tocool to room temperature.

The resultant microcapsules have a median particle size of 12.6 microns,a fracture strength of 7.68±2.0 MPa, and a 51%±20% deformation atfracture.

Example 2. Polyacrylate Microcapsules

An oil solution, consisting of 96 g Fragrance Oil, 64 g isopropylmyristate, 0.86 g DuPont Vazo-67, 0.69 g Wako Chemicals V-501, is addedto a 35° C. temperature controlled steel jacketed reactor, with mixingat 1000 rpm (4 tip, 2″ diameter, flat mill blade) and a nitrogen blanketapplied at 100 cc/min. The oil solution is heated to 70° C. in 45minutes, held at 75° C. for 45 minutes, and cooled to 50° C. in 75minutes. This will be called oil solution A.

In a reactor vessel, an aqueous solution is prepared consisting of 300 gdeionized water to which is dispersed 2.40 grams of Celvol 540 polyvinylalcohol at 25 degrees Centigrade. The mixture is heated to 85 degreesCentigrade and held there for 45 minutes. The solution is cooled to 30degrees Centigrade. 1.03 grams of Wako Chemicals V-501 initiator isadded, along with 0.51 grams of 40% sodium hydroxide solution. Heat thesolution to 50° C., and maintain the solution at that temperature.

To the oil solution A, add 0.19 grams of tert-butyl amino ethylmethacrylate (Sigma Aldrich), 0.19 grams of beta-carboxy ethyl acrylate(Sigma Aldrich), and 15.41 grams of Sartomer CN975 (Sartomer, Inc.). Mixthe acrylate monomers into the oil phase for 10 minutes. This will becalled oil solution B. Use a Caframo mixer with a 4-blade pitchedturbine agitator.

Start nitrogen blanket on top of the aqueous solution in reactor. Starttransferring the oil solution B into the aqueous solution in thereactor, with minimal mixing. Increase mixing to 1800-2500 rpm, for 60minutes to emulsify the oil phase into the water solution. After millingis completed, mixing is continued with a 3″ propeller at 350 rpm. Thebatch is held at 50° C. for 45 minutes, the temperature is increased to75° C. in 30 minutes, held at 75° C. for 4 hours, heated to 95° C. in 30minutes and held at 95° C. for 6 hours. The batch is then allowed tocool to room temperature.

The resultant microcapsules have a median particle size of 12.6 microns,a fracture strength of 2.60±1.2 MPa, 37%±15% deformation at fracture.

Example 3. Polyacrylate Microcapsules

An oil solution, consisting of 128.4 g Fragrance Oil, 32.1 g isopropylmyristate, 0.86 g DuPont Vazo-67, 0.69 g Wako Chemicals V-501, is addedto a 35° C. temperature controlled steel jacketed reactor, with mixingat 1000 rpm (4 tip, 2″ diameter, flat mill blade) and a nitrogen blanketapplied at 100 cc/min. The oil solution is heated to 70° C. in 45minutes, held at 75° C. for 45 minutes, and cooled to 50° C. in 75minutes. This will be called oil solution A.

In a reactor vessel, an aqueous solution is prepared consisting of 300 gdeionized water to which is dispersed 2.40 grams of Celvol 540 polyvinylalcohol at 25 degrees Centigrade. The mixture is heated to 85 degreesCentigrade and held there for 45 minutes. The solution is cooled to 30degrees Centigrade. 1.03 grams of Wako Chemicals V-501 initiator isadded, along with 0.51 grams of 40% sodium hydroxide solution. Heat thesolution to 50° C., and maintain the solution at that temperature.

To the oil solution A, add 0.19 grams of tert-butyl amino ethylmethacrylate (Sigma Aldrich), 0.19 grams of beta-carboxy ethyl acrylate(Sigma Aldrich), and 15.41 grams of Sartomer CN975 (Sartomer, Inc.). Mixthe acrylate monomers into the oil phase for 10 minutes. This will becalled oil solution B. Use a Caframo mixer with a 4-blade pitchedturbine agitator.

Start nitrogen blanket on top of the aqueous solution in reactor. Starttransferring the oil solution B into the aqueous solution in thereactor, with minimal mixing. Increase mixing to 1300-1600 rpm, for 60minutes to emulsify the oil phase into the water solution. After millingis completed, mixing is continued with a 3″ propeller at 350 rpm. Thebatch is held at 50° C. for 45 minutes, the temperature is increased to75° C. in 30 minutes, held at 75° C. for 4 hours, heated to 95° C. in 30minutes and held at 95° C. for 6 hours. The batch is then allowed tocool to room temperature.

The resultant microcapsules have a median particle size of 26.1 microns,a fracture strength of 1.94±1.2 MPa, 30%±14% deformation at fracture.

Example 4. Polyacrylate Microcapsules

An oil solution, consisting of 128.4 g Fragrance Oil, 32.1 g isopropylmyristate, 0.86 g DuPont Vazo-67, 0.69 g Wako Chemicals V-501, is addedto a 35° C. temperature controlled steel jacketed reactor, with mixingat 1000 rpm (4 tip, 2″ diameter, flat mill blade) and a nitrogen blanketapplied at 100 cc/min. The oil solution is heated to 70° C. in 45minutes, held at 75° C. for 45 minutes, and cooled to 50° C. in 75minutes. This will be called oil solution A.

In a reactor vessel, an aqueous solution is prepared consisting of 300 gdeionized water to which is dispersed 2.40 grams of Celvol 540 polyvinylalcohol at 25 degrees Centigrade. The mixture is heated to 85 degreesCentigrade and held there for 45 minutes. The solution is cooled to 30degrees Centigrade. 1.03 grams of Wako Chemicals V-501 initiator isadded, along with 0.51 grams of 40% sodium hydroxide solution. Heat thesolution to 50° C., and maintain the solution at that temperature.

To the oil solution A, add 0.19 grams of tert-butyl amino ethylmethacrylate (Sigma Aldrich), 0.19 grams of beta-carboxy ethyl acrylate(Sigma Aldrich), and 15.41 grams of Sartomer CN975 (Sartomer, Inc.). Mixthe acrylate monomers into the oil phase for 10 minutes. This will becalled oil solution B. Use a Caframo mixer with a 4-blade pitchedturbine agitator.

Start nitrogen blanket on top of the aqueous solution in reactor. Starttransferring the oil solution B into the aqueous solution in thereactor, with minimal mixing. Increase mixing to 2500-2800 rpm, for 60minutes to emulsify the oil phase into the water solution. After millingis completed, mixing is continued with a 3″ propeller at 350 rpm. Thebatch is held at 50° C. for 45 minutes, the temperature is increased to75° C. in 30 minutes, held at 75° C. for 4 hours, heated to 95° C. in 30minutes and held at 95° C. for 6 hours. The batch is then allowed tocool to room temperature.

The resultant microcapsules have a median particle size of 10.0 microns,a fracture strength of 7.64±2.2 MPa, 56%±20% deformation at fracture.

Example 5. Polyurea/Urethane Microcapsules

An aqueous solution, consisting of 6.06 g Celvol 523 polyvinyl alcohol(Celanese Chemicals) and 193.94 g deionized water, is added into atemperature controlled steel jacketed reactor at room temperature. Thenan oil solution, consisting of 75 g Scent A and 25 g Desmodur N3400(polymeric hexamethylene diisocyanate), is added into the reactor. Themixture is emulsified with a propeller (4 tip, 2″ diameter, flat millblade; 2200 rpm) to desired emulsion droplet size. The resultingemulsion is then mixed with a Z-bar propeller at 450 rpm. An aqueoussolution, consisting of 47 g water and 2.68 g tetraethylenepentamine, isadded into the emulsion. And it is then heated to 60° C., held at 60° C.for 8 hours, and allowed to cool to room temperature. The medianparticle size of the resultant microcapsules is 10 microns.

Example 6. Polyurea/Urethane Microcapsules

Prepare the Oil Phase by adding 4.44 grams of isophorone diisocyanate(Sigma Aldrich) to 5.69 grams of Scent A fragrance oil. Prepare a WaterPhase by mixing 1.67 grams of Ethylene Diamine (Sigma Aldrich) and 0.04grams of 1,4-Diazabicyclo[2.2.2]octane (Sigma Aldrich) into 40 grams ofa 5 wt % aqueous solution of Polyvinylpyrrolidone K-90 (Sigma Aldrich)at 10 degrees Centigrade. Next, add the Oil Phase contents to 15.0 gramsof a 5 wt % aqueous solution of Polyvinylpyrrolidone K-90 (SigmaAldrich), while agitating the mix at 1400 RPM using a Janke & Kunkel IKALaboretechnik RW20 DZM motor with a 3-blade turbine agitator forapproximately 9 minutes. Next, add the addition of the Water Phase intothe emulsified Oil Phase dropwise over a 6.5 minute period, whilecontinuing to agitate at 1400 RPM. Continue to agitate for 23 minutes,then reduce the agitation speed to 1000 RPM. After 3.75 additionalhours, reduce the agitation speed to 500 RPM, and continue to agitatefor 14 hours. Start heating the dispersion to 50 degrees Centigrade,over a 2 hour period. Age the capsules at 50 C for 2 hours, then collectthe microcapsules. The resultant microcapsules have a median particlesize of 12 microns.

Example 7. Polyacrylate Microcapsules

The polyacrylate microcapsule with the characteristics displayed inTable 3 may be prepared as follows. An oil solution, consisting of112.34 g Fragrance Oil, 12.46 g isopropyl myristate, 2.57 g DuPontVazo-67, 2.06 g Wako Chemicals V-501, is added to a 35° C. temperaturecontrolled steel jacketed reactor, with mixing at 1000 rpm (4 tip, 2″diameter, flat mill blade) and a nitrogen blanket applied at 100 cc/min.The oil solution is heated to 70° C. in 45 minutes, held at 75° C. for45 minutes, and cooled to 50° C. in 75 minutes. This will be called oilsolution A.

In a reactor vessel, an aqueous solution is prepared consisting of 300 gdeionized water to which is dispersed 2.40 grams of Celvol 540 polyvinylalcohol at 25 degrees Centigrade. The mixture is heated to 85 degreesCentigrade and held there for 45 minutes. The solution is cooled to 30degrees Centigrade. 1.03 grams of Wako Chemicals V-501 initiator isadded, along with 0.51 grams of 40% sodium hydroxide solution. Heat thesolution to 50° C., and maintain the solution at that temperature.

To the oil solution A, add 0.56 grams of tert-butyl amino ethylmethacrylate (Sigma Aldrich), 0.56 grams of beta-carboxy ethyl acrylate(Sigma Aldrich), and 46.23 grams of Sartomer CN975 (Sartomer, Inc.). Mixthe acrylate monomers into the oil phase for 10 minutes. This will becalled oil solution B. Use a Caframo mixer with a 4-blade pitchedturbine agitator.

Start nitrogen blanket on top of the aqueous solution in reactor. Starttransferring the oil solution B into the aqueous solution in thereactor, with minimal mixing. Increase mixing to 1800-2500 rpm, for 60minutes to emulsify the oil phase into the water solution. After millingis completed, mixing is continued with a 3″ propeller at 350 rpm. Thebatch is held at 50° C. for 45 minutes, the temperature is increased to75° C. in 30 minutes, held at 75° C. for 4 hours, heated to 95° C. in 30minutes and held at 95° C. for 6 hours. The batch is then allowed tocool to room temperature.

Example 8. Spray Drying of Perfume Microcapsules

The microcapsules of Example 1 are pumped at a rate of 1 kg/hr into aco-current spray dryer (Niro Production Minor, 1.2 meter diameter) andatomized using a centrifugal wheel (100 mm diameter) rotating at 18,000RPM. Dryer operating conditions are: air flow of 80 kg/hr, an inlet airtemperature of 200 degrees Centigrade, an outlet temperature of 100degrees Centigrade, dryer operating at a pressure of −150 millimeters ofwater vacuum. The dried powder is collected at the bottom of a cyclone.The collected microcapsules have an approximate particle diameter of 11microns. The equipment used the spray drying process may be obtainedfrom the following suppliers: IKA Werke GmbH & Co. KG, Janke andKunkel-Str. 10, D79219 Staufen, Germany; Niro A/S Gladsaxevej 305, P.O.Box 45, 2860 Soeborg, Denmark and Watson-Marlow Bredel Pumps Limited,Falmouth, Cornwall, TR11 4RU, England.

Example 9

The microcapsules described in EXAMPLES 1-8 may be used as illustratedin the First Composition below at the indicated percentage.

Second Composition (% w/w) Ethanol (96%) 74.88 Fragrance 14 Water 10.82Diethylamino Hydroxybenzol Hexyl 0.195 Benzoate EthylhexylMethoxycinnamate 0.105

First Composition (% w/w) Water 92.5847 Microcapsules 6.0361 Carbomer0.5018 Phenoxyethanol 0.2509 Magnesium Chloride 0.2456 Sodium Hydroxide0.1254 Disodium EDTA 0.0836 Polyvinyl alcohol 0.0655 Sodium Benzoate0.0409 Potassium Sorbate 0.0409 Xanthan Gum 0.0246

It should be understood that every maximum numerical limitation giventhroughout this specification includes every lower numerical limitation,as if such lower numerical limitations were expressly written herein.Every minimum numerical limitation given throughout this specificationwill include every higher numerical limitation, as if such highernumerical limitations were expressly written herein. Every numericalrange given throughout this specification will include every narrowernumerical range that falls within such broader numerical range, as ifsuch narrower numerical ranges were all expressly written herein.

The dimensions and values disclosed herein are not to be understood asbeing strictly limited to the exact numerical values recited. Instead,unless otherwise specified, each such dimension is intended to mean boththe recited value and a functionally equivalent range surrounding thatvalue. For example, a dimension disclosed as “40 mm” is intended to mean“about 40 mm.”

Every document cited herein, including any cross referenced or relatedpatent or application and any patent application or patent to which thisapplication claims priority or benefit thereof, is hereby incorporatedherein by reference in its entirety unless expressly excluded orotherwise limited. The citation of any document is not an admission thatit is prior art with respect to any invention disclosed or claimedherein or that it alone, or in any combination with any other referenceor references, teaches, suggests or discloses any such invention.Further, to the extent that any meaning or definition of a term in thisdocument conflicts with any meaning or definition of the same term in adocument incorporated by reference, the meaning or definition assignedto that term in this document shall govern.

While particular embodiments of the present invention have beenillustrated and described, it would be obvious to those skilled in theart that various other changes and modifications can be made withoutdeparting from the spirit and scope of the invention. It is thereforeintended to cover in the appended claims all such changes andmodifications that are within the scope of this invention.

What is claimed is:
 1. A dispenser comprising: a first reservoir, thefirst reservoir comprising a first pump and a first composition; asecond reservoir, the second reservoir comprising a second pump and asecond composition; a first channel having a proximal end and a distalend; a second channel having a proximal end and a distal end; an exitorifice; a premix chamber; a swirl chamber; and an actuator; wherein theproximal end of the first channel is in liquid communication with thefirst pump and the distal end of the first channel is in liquidcommunication with the premix chamber; wherein the proximal end of thesecond channel is in liquid communication with the second pump and thedistal end of the second channel is in liquid communication with thepremix chamber; wherein the premix chamber is located between a firstexit tube and a second exit tube and is in liquid communication with theswirl chamber; wherein the swirl chamber is located between the exitorifice and the first and said second exit tubes; wherein said firstpump and second pump are operatively associated with the actuator;wherein said first composition comprises microcapsules and a carriercomprising water and said second composition comprises a volatilesolvent; wherein said premix chamber comprises a mixing element.
 2. Thedispenser of claim 1, wherein the first composition and the secondcomposition mix prior to exiting via the exit orifice but do not mixprior to entering the premix chamber.
 3. The dispenser of claim 1,wherein the dispenser dispenses a dispensing volume and the premixchamber comprises a mixing volume; wherein the dispensing volume isgreater than the mixing volume.
 4. The dispenser of claim 3, wherein themixing volume is from about 1% to 75% by weight, of the dispensingvolume.
 5. The dispenser of claim 1, wherein first reservoir and thesecond reservoir have different volumes.
 6. The dispenser of claim 4,wherein the dispensing volume is from about 30 microliters to about 300microliters.
 7. The dispenser of claim 1, wherein the first pump and thesecond pump dispense different volumes.
 8. The dispenser of claim 1,wherein the dispenser further comprises a first dip tube and a seconddip tube; wherein the first dip tube is in communication with the firstpump and the second dip tube is in communication with the second pump.9. The dispenser of claim 1, wherein the first composition and secondcomposition are dispensed as a mixture from the exit orifice at a weightratio of from 10:1 to 1:10.
 10. The dispenser of claim 1, wherein theswirl chamber further comprises one or more flow passages.
 11. Thedispenser of claim 10, wherein the swirl chamber further comprises aswirl zone; wherein said swirl zone is in communication with the exitorifice and at least one flow passage.
 12. The dispenser of claim 1,wherein the microcapsules comprise a core material and a shellencapsulating the core material; wherein the core material comprises afragrance.
 13. The dispenser of claim 12, wherein the wherein the shellcomprises a material selected from the group consisting ofpolyacrylates, polyethylenes, polyamides, polystyrenes, polyisoprenes,polycarbonates, polyesters, polyureas, polyurethanes, polyolefins,polysaccharides, epoxy resins, vinyl polymers, and combinations thereof.14. The dispenser of claim 1, wherein the microcapsules have a fracturestrength of from about 0.2 MPa to about 20 MPa.
 15. The dispenser ofclaim 1, wherein the first composition is substantially free of amaterial selected from the group consisting of a propellant, ethanol, adetersive surfactant, and combinations thereof.
 16. The dispenser ofclaim 1, wherein the second composition is substantially free of amaterial selected from the group consisting of a propellant,microcapsules, a detersive surfactant, and combinations thereof.
 17. Thedispenser of claim 1, wherein the microcapsules have a medianvolume-weighted particle size of from about 2 microns to about 80microns.
 18. The dispenser of claim 1, wherein the volatile solvent isethanol.
 19. The dispenser of claim 1 where the distal end of the firstchannel is in liquid communication with the premix chamber along a firstdirection and the distal end of the second channel is in liquidcommunication with the premix chamber along a second direction, whereinthe first and second directions are opposing in a straight line; aremutually inclined at angle less than 180°; or are parallel and offsetone from the other.
 20. The dispenser of claim 1 where the premixchamber has a cylindrical axis and the distal end of the first channeland the distal end of the second channel are in liquid communicationwith the premix chamber at respective locations spaced along saidcylindrical axis.
 21. A method of providing a longer lasting fragrance,the method comprising spraying the first and second composition usingthe dispenser of claim 1.